FHIR Encounter

Base Path: /fhir/4.0/Encounter

Version: 2.0.0

The FHIR Encounter API allows you to look up a patient's encounters. The endpoint provides the ability to:

  • Retrieve all Encounter resources that match a search criteria for a given patient.
  • Retrieve a specific Encounter resource based on its resource ID.
  • Retrieve the history of an Encounter resource based on its resource ID.
  • Retrieve a specific version of an Encounter resource based on its FHIR ID and Version ID.
  • Retrieve Encounter results from third-party sources.
  • Supports exporting resources via FHIR Bulk.

The data returned in this API is subject to privacy and permissions settings, refer to the [Working with Privacy guide to learn how this might affect your application.

The Encounter API aggregates data from multiple sources, to learn about working with aggregated APIs refer to the Working with Aggregation guide in the Knowledge Hub.

This API is based on the R4 release of the FHIR standard, for more information on this API refer to the official FHIR documentation.


Methods

Retrieve Encounters for a Patient

GET /fhir/4.0/Encounter/

This method returns all encounters for the patient identified either by patient.identifier or by patient. Optionally additional filtering can be added.


Parameters

Name

Type

Data Type

Description


Name:

patient.identifier

required

Type:

query

Data Type:

string

Description:

The patient identifier consists of patient identifier namespace, also known as the system, and identifier, separated using a URL encoded | character i.e. %7c.

Note:

  • You must either define the patient.identifier or patient, not both.
  • In addition to having the required patient.identifier or patient, you can defined chained patient elements to define filters on the reference, each of the chained parameters can specify multiple comma separated values.

Sample format of the query is

  • patient.identifier={namespace}|{identifier}
  • patient.identifier={namespace}|{identifier} & patient.gender=male & patient.birthdate=2002-05-01


Sample Value: ORION|AAA-00315-7



Name:

patient

required

Type:

query

Data Type:

string

Description:

The patient resource id.

Note:

  • You must either define the patient.identifier or patient, not both.
  • In addition to having the required patient.identifier or patient, you can defined chained patient elements to define filters on the reference, each of the chained parameters can specify multiple comma separated values.

    Sample format of the query is

    • patient={patient FHIRID}
    • patient={patient FHIRID} & patient.gender=male & patient.birthdate=2002-05-01


Sample Value: patient=IFAUCQJNGAYTENBNHBAE6USJJ5HA



Name:

date

optional

Type:

query

Data Type:

array

Description:

Filters the Encounters to those with a date on, before, or after a specific date, date-time, or date range. The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact date or date-time matching is implied. Dates must be formatted according to ISO 8601 either as a date only (e.g. 1997-07-16) or as a date-time including the timezone (e.g. 1997-07-16T19:20:30+13:00). Ensure that special characters such as + are URL encoded i.e. %2B.

The format of the query is

  • date=gt{dateTimeValue}
  • date=ge{dateTimeValue}&date=le{dateTimeValue}


Sample Value: gt2009-01-01T01:00:00%2B13:00



Name:

type

optional

Type:

query

Data Type:

array

Description:

Filters the encounters to ones with the specified type(s). The type value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: type=http://snomed.info/sct|183807002



Name:

class

optional

Type:

query

Data Type:

array

Description:

Filters the encounters to ones with the specified classification(s). The class value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: class=AMB,http://terminology.hl7.org/CodeSystem/v3-ActCode|IMP



Name:

status

optional

Type:

query

Data Type:

array

Description:

Filters the encounters to those having the specified status value(s). Multiple statuses can be specified as comma separated values. Possible values are

  • planned
  • arrived
  • triaged
  • in-progress
  • onleave
  • finished
  • cancelled
  • entered-in-error
  • unknown

    Note:

  • if a status system is specified only http://hl7.org/fhir/encounter-status can be used.
  • Supports passing in a comma-separated list of values.


Sample Value: final,registered



Name:

identifier

optional

Type:

query

Data Type:

array

Description:

Filters Encounters by the identifier associated with this encounter.

Note: The identifier can be a single item or a comma separated list of identifiers. Each identifier is defined by system and value , separated using a URL encoded | character i.e. %7c.


Sample Value: urn:oid:1.3.4.5.6.7|2345234234234, urn:text:sysA|2345



Name:

reason-code

optional

Type:

query

Data Type:

array

Description:

Filters the encounters to ones with the specified reason code(s). The reason-code value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: reason-code=http://snomed.info/sct|34068001P



Name:

reason-reference

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the reason reference. Identified by Encounter.reasonReference reference.

Note: reason-reference can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: result-reference:Condition.code=http://snomed.info/sct|363346000



Name:

service-provider

optional

Type:

query

Data Type:

array

Description:

Filters encounters by he organization (facility) responsible for the Encounter. Identified by Encounter.serviceProvider reference.

Note: service-provider can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: service-provider.type=http://terminology.hl7.org/CodeSystem/organization-type|prov , http://terminology.hl7.org/CodeSystem/organization-type|dept



Name:

diagnosis

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the diagnosis or procedure relevant to the encounter. Identified by Encounter.diagnosis.condition reference.

Note: diagnosis can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: diagnosis:Condition.code=http://snomed.info/sct|363346000



Name:

participant

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the persons involved in the encounter other than the patient. Identified by Encounter.participant.individual reference.

Note: participant can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: participant:Practitioner.family=Smith&participant:Practitioner.given=Bob,Robert



Name:

practitioner

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the practitioners involved in the encounter. Identified by Encounter.participant.individual when the individual is a Practitioner reference.

Note: practitioner can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: practitioner.family=Smith&participant:Practitioner.given=Bob,Robert



Name:

participant-type

optional

Type:

query

Data Type:

array

Description:

Filters the encounters the role(s) of participant in the encounter. The participant-type value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: participant-type=http://terminology.hl7.org/CodeSystem/v3-ParticipationType|CON, http://terminology.hl7.org/CodeSystem/v3-ParticipationType|REF



Name:

special-arrangement

optional

Type:

query

Data Type:

array

Description:

Filters the encounters special arrangement(s) associated to the encounter. The class value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: special-arrangement=dog



Name:

account

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the accounts that may be used for billing for the encounter. Identified by Encounter.account reference.

Note: account can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: account.type=PBILLACCT



Name:

part-of

optional

Type:

query

Data Type:

array

Description:

Filters encounters by by Another Encounter that the Encounter is part of. Identified by Encounter.partOf reference.

Note: part-of can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: part-of=Encounter/shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ



Name:

based-on

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the ServiceRequest that initiated the Encounter. Identified by Encounter.basedOn reference.

Note: based-on can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: based-on.code=http://snomed.info/sct|62013009,http://loinc.org|35542-0



Name:

location

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the Location where the Encounter took place. Identified by Encounter.location reference.

Note: location can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: location.type=AMB & location.address-city=AUCKLAND



Name:

location-period

optional

Type:

query

Data Type:

array

Description:

Filters the Encounters filter encounters by the time period during which the patient was present at the location, compare to a date on, before, or after a specific date, date-time, or date range. The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact date or date-time matching is implied. Dates must be formatted according to ISO 8601 either as a date only (e.g. 1997-07-16) or as a date-time including the timezone (e.g. 1997-07-16T19:20:30+13:00). Ensure that special characters such as + are URL encoded i.e. %2B.

The format of the query is

  • location-period=gt{dateTimeValue}
  • location-period=ge{dateTimeValue}&location-period=le{dateTimeValue}


Sample Value: location-period=gt2012-01-01&location-period=lt2022-01-01



Name:

appointment

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the appointment that scheduled the encounter. Identified by Encounter.appointment reference.

Note: appointment can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: appointment.date=gt2024-01-01&appointment.date=gt2024-02-01



Name:

episode-of-care

optional

Type:

query

Data Type:

array

Description:

Filters encounters by the Episode(s) of care that this encounter should be recorded against. Identified by Encounter.episodeOfCare reference.

Note: episode-of-care can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: episode-of-care.date=gt2024-01-01 & episode-of-care.date=gt2024-02-01



Name:

length

optional

Type:

query

Data Type:

array

Description:

Filters the encounter by length of the visit. The length value consists of a prefix, value, unit system and a unit sperated by a URL encoded | character i.e. %7c The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact matching is implied.

The format of the query is

  • length={prefix}}{value}|{units system}|{unit code}
  • length={prefix}}{value}|{units system}|{unit code} & {prefix}}{value}|{units system}|{unit code}
  • length={ge}}{value}|{units system}|{unit code} & {le}}{value}|{units system}|{unit code}


Sample Value: length=gt30|http://unitsofmeasure.org|min & length=lt100|http://unitsofmeasure.org|min



Name:

-include-sources

optional

Type:

query

Data Type:

array

Description:

The -include-sources parameter defines which sources should be queried for the results.

Note: Either -include-sources or -exclude-sources parameter can be specified, not both. If -include-sources is specified, ONLY the specified sources will be searched. Note that the sources specified should be enabled.


Sample Value: Orion%20Health%5C%5Cu2122%20R4%20HL7V2%20Encounters



Name:

-exclude-sources

optional

Type:

query

Data Type:

array

Description:

The -exclude-sources parameter defines which sources should NOT be queried for the results.

Note: Either -include-sources or -exclude-sources parameter can be specified, not both. If -exclude-sources is specified, the specified sources will NOT be searched. Note that the sources specified should be enabled.


Sample Value: Orion%20Health%5C%5Cu2122%20R4%20HL7V2%20Encounters



Name:

-cdr-include-cancelled

optional

Type:

query

Data Type:

string

Description:

The Only supported values for the parameter are "true" or "false". Set to true to return all CDR8 encounters (including the cancelled that are not returned by default).

Note: -cdr-include-cancelled is applicable only for the Encounters CDR8 source, and ignored by other sources.


Sample Value: true



Name:

_summary

optional

Type:

query

Data Type:

string

Description:

Instructs the server to return a subset of the resource, reducing the size of the reponse payload. Possible values are

  • true: return summaries only
  • false: return full resources
  • count: return the count of search matches
  • text: return only the text, id, meta, and top-level mandatory elements
  • data: remove the text element


Sample Value: true



Name:

_lastUpdated

optional

Type:

query

Data Type:

array

Description:

Filters based on when the resource version was last changed, before, or after a specific date, date-time, or date range. The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact date or date-time matching is implied. Dates must be formatted according to ISO 8601 either as a date only (e.g. 1997-07-16) or as a date-time including the timezone (e.g. 1997-07-16T19:20:30+13:00). Ensure that special characters such as + are URL encoded i.e. %2B.

The format of the query is

  • _lastUpdated=gt{dateTimeValue}
  • _lastUpdated=ge{dateTimeValue}&_lastUpdated=le{dateTimeValue}


Sample Value: ge2012-01-01T01:00:00+13:00



Name:

_elements

optional

Type:

query

Data Type:

array

Description:

Request a specific set of elements be returned, or excluded as part of a resource in the search results. Use _elements for the elements to include and _elements:exclude for the elements to exclude.


Sample Value: _elements=code,type,status,_elements:exclude=*.extension,*.basedOn



Name:

-cursor

optional

Type:

query

Data Type:

string

Description:

A server internal parameter to navigate different pages.

This parameter is returned by the server as part of the Bundle 'next' link of a paginated query. And is used to retrieve the next page




Name:

_count

optional

Type:

query

Data Type:

integer

Description:

Limit the number of match results to the specified _count. When _count is specified, the query will be paginated, and only _count or less results will be returned.

The returned bundle may contain a next link if more results could be available.


Sample Value: 30



Name:

_sort

optional

Type:

query

Data Type:

array

Description:

Request which order results should be returned in.

Supported _sort parameters are:

  • date to sort by Encounter.period ascending (sorting the Encounter.period.start)
  • -date to sort by Encounter.period descending (sorting the Encounter.period.start)
  • _lastUpdated to sort by Encounter.Meta.lastUpdated ascending
  • -_lastUpdatedto sort by Encounter.Meta.lastUpdated descending

You can use any combination of the parameters


Default Value: -date

Sample Value: _sort=-date,_sort=-date, -_lastUpdated



Name:

X-Request-Id

optional

Type:

header

Data Type:

string

Description:

Supply a request Id to track the request.


Sample Value: adUEctf6urd



Name:

Accept

optional

Type:

header

Data Type:

string

Description:

Media type of the response. Possible values are application/json and application/xml. If both _format and Accept are specified, _format takes precedence.


Default Value: application/json

Sample Value: application/json



Name:

Accept-Language

optional

Type:

header

Data Type:

string

Description:

Specifies the language that the results will be translated to. If not specified it will default to the server's locale. (e.g. fr-FR for french)


Sample Value: en-US



Name:

_format

optional

Type:

query

Data Type:

string

Description:

Media type of the response. It takes precedence over the Accept header. Possible values are json and xml.


Default Value: json

Sample Value: json



Name:

_pretty

optional

Type:

query

Data Type:

string

Description:

Ask for a pretty printed response for human convenience.


Default Value: true

Sample Value: true



Name:

CSRF-Token

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. The csrfToken from the OHP session must be included in this header.

System will validate the token and reject the request if the token is invalid or not present.

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.




Name:

X-Send-Open-API

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. This header is required to distinguish the api requests from known senders.

System will validate "X-Send-Open-API" request header is present or not. If it is not present, system will reject the request

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.



Responses


application/json+fhir

200

Returns a FHIR Bundle containing 0..* OperationOutcome resources and 0..* Encounter resources


application/json+fhir

400

This response code is returned when the query is invalid e.g. an invalid parameter or a partial token in the search.

Sample Requests

Retrieve Encounters with a specific date for a Patient identified by a patient identifier
curl -X GET "https://developer-solution/fhir/4.0/Encounter?patient.identifier=ORION%7CAAA-00315-7&date=gt2009-01-01T01:00:00%2B13:00" \
-H 'Accept: application/json' \
-H 'Authorization: Basic bGV2ZWwxLnN5c19hOk9yaW9uc3k1IT8='

Retrieve Encounters for a Patient

POST /fhir/4.0/Encounter/_search

This method returns all encounters for the patient identified either by patient.identifier or by patient. Optionally additional filtering can be added. This is the secure alternative to the GET search.


Parameters

Name

Type

Data Type

Description


Name:

Content-Type

required

Type:

header

Data Type:

string

Description:

Specifies how to encode the form data. The Content-Type value must be application/x-www-form-urlencoded


Sample Value: application/x-www-form-urlencoded



Name:

patient.identifier

required

Type:

formData

Data Type:

string

Description:

The patient identifier consists of patient identifier namespace, also known as the system, and identifier, separated using a URL encoded | character i.e. %7c.

Note:

  • You must either define the patient.identifier or patient, not both.
  • In addition to having the required patient.identifier or patient, you can defined chained patient elements to define filters on the reference, each of the chained parameters can specify multiple comma separated values.

Sample format of the query is

  • patient.identifier={namespace}|{identifier}
  • patient.identifier={namespace}|{identifier} & patient.gender=male & patient.birthdate=2002-05-01


Sample Value: ORION|AAA-00315-7



Name:

patient

required

Type:

formData

Data Type:

string

Description:

The patient resource id.

Note:

  • You must either define the patient.identifier or patient, not both.
  • In addition to having the required patient.identifier or patient, you can defined chained patient elements to define filters on the reference, each of the chained parameters can specify multiple comma separated values.

    Sample format of the query is

    • patient={patient FHIRID}
    • patient={patient FHIRID} & patient.gender=male & patient.birthdate=2002-05-01


Sample Value: IFAUCQJNGAYTENBNHBAE6USJJ5HA



Name:

date

optional

Type:

formData

Data Type:

array

Description:

Filters the Encounters to those with a date on, before, or after a specific date, date-time, or date range. The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact date or date-time matching is implied. Dates must be formatted according to ISO 8601 either as a date only (e.g. 1997-07-16) or as a date-time including the timezone (e.g. 1997-07-16T19:20:30+13:00). Ensure that special characters such as + are URL encoded i.e. %2B.

The format of the query is

  • date=gt{dateTimeValue}
  • date=ge{dateTimeValue}&date=le{dateTimeValue}


Sample Value: gt2009-01-01T01:00:00%2B13:00



Name:

type

optional

Type:

formData

Data Type:

array

Description:

Filters the encounters to ones with the specified type(s). The type value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: type=http://snomed.info/sct|183807002



Name:

class

optional

Type:

formData

Data Type:

array

Description:

Filters the encounters to ones with the specified classification(s). The class value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: class=AMB,http://terminology.hl7.org/CodeSystem/v3-ActCode|IMP



Name:

status

optional

Type:

formData

Data Type:

array

Description:

Filters the encounters to those having the specified status value(s). Multiple statuses can be specified as comma separated values. Possible values are

  • planned
  • arrived
  • triaged
  • in-progress
  • onleave
  • finished
  • cancelled
  • entered-in-error
  • unknown

    Note:

  • if a status system is specified only http://hl7.org/fhir/encounter-status can be used.
  • Supports passing in a comma-separated list of values.


Sample Value: final,registered



Name:

identifier

optional

Type:

formData

Data Type:

array

Description:

Filters Encounters by the identifier associated with this encounter.

Note: The identifier can be a single item or a comma separated list of identifiers. Each identifier is defined by system and value , separated using a URL encoded | character i.e. %7c.


Sample Value: urn:oid:1.3.4.5.6.7|2345234234234, urn:text:sysA|2345



Name:

reason-code

optional

Type:

formData

Data Type:

array

Description:

Filters the encounters to ones with the specified reason code(s). The reason-code value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: reason-code=http://snomed.info/sct|34068001P



Name:

reason-reference

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the reason reference. Identified by Encounter.reasonReference reference.

Note: reason-reference can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: result-reference:Condition.code=http://snomed.info/sct|363346000



Name:

service-provider

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by he organization (facility) responsible for the Encounter. Identified by Encounter.serviceProvider reference.

Note: service-provider can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: service-provider.type=http://terminology.hl7.org/CodeSystem/organization-type|prov , http://terminology.hl7.org/CodeSystem/organization-type|dept



Name:

diagnosis

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the diagnosis or procedure relevant to the encounter. Identified by Encounter.diagnosis.condition reference.

Note: diagnosis can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: diagnosis:Condition.code=http://snomed.info/sct|363346000



Name:

participant

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the persons involved in the encounter other than the patient. Identified by Encounter.participant.individual reference.

Note: participant can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: participant:Practitioner.family=Smith&participant:Practitioner.given=Bob,Robert



Name:

practitioner

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the practitioners involved in the encounter. Identified by Encounter.participant.individual when the individual is a Practitioner reference.

Note: practitioner can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: practitioner.family=Smith&participant:Practitioner.given=Bob,Robert



Name:

participant-type

optional

Type:

formData

Data Type:

array

Description:

Filters the encounters the role(s) of participant in the encounter. The participant-type value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: participant-type=http://terminology.hl7.org/CodeSystem/v3-ParticipationType|CON, http://terminology.hl7.org/CodeSystem/v3-ParticipationType|REF



Name:

special-arrangement

optional

Type:

formData

Data Type:

array

Description:

Filters the encounters special arrangement(s) associated to the encounter. The class value consists of a coding system and a code separated using a URL encoded | character i.e. %7c

Note: Supports passing in a comma-separated list of values.


Sample Value: special-arrangement=dog



Name:

account

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the accounts that may be used for billing for the encounter. Identified by Encounter.account reference.

Note: account can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: account.type=PBILLACCT



Name:

part-of

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by by Another Encounter that the Encounter is part of. Identified by Encounter.partOf reference.

Note: part-of can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: part-of=Encounter/shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ



Name:

based-on

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the ServiceRequest that initiated the Encounter. Identified by Encounter.basedOn reference.

Note: based-on can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: based-on.code=http://snomed.info/sct|62013009,http://loinc.org|35542-0



Name:

location

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the Location where the Encounter took place. Identified by Encounter.location reference.

Note: location can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: location.type=AMB & location.address-city=AUCKLAND



Name:

location-period

optional

Type:

formData

Data Type:

array

Description:

Filters the Encounters filter encounters by the time period during which the patient was present at the location, compare to a date on, before, or after a specific date, date-time, or date range. The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact date or date-time matching is implied. Dates must be formatted according to ISO 8601 either as a date only (e.g. 1997-07-16) or as a date-time including the timezone (e.g. 1997-07-16T19:20:30+13:00). Ensure that special characters such as + are URL encoded i.e. %2B.

The format of the query is

  • location-period=gt{dateTimeValue}
  • location-period=ge{dateTimeValue}&location-period=le{dateTimeValue}


Sample Value: location-period=gt2012-01-01&location-period=lt2022-01-01



Name:

appointment

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the appointment that scheduled the encounter. Identified by Encounter.appointment reference.

Note: appointment can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: appointment.date=gt2024-01-01&appointment.date=gt2024-02-01



Name:

episode-of-care

optional

Type:

formData

Data Type:

array

Description:

Filters encounters by the Episode(s) of care that this encounter should be recorded against. Identified by Encounter.episodeOfCare reference.

Note: episode-of-care can be chained to define filters on the reference, each of the chained parameters can specify multiple comma separated values.


Sample Value: episode-of-care.date=gt2024-01-01 & episode-of-care.date=gt2024-02-01



Name:

length

optional

Type:

formData

Data Type:

array

Description:

Filters the encounter by length of the visit. The length value consists of a prefix, value, unit system and a unit sperated by a URL encoded | character i.e. %7c The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact matching is implied.

The format of the query is

  • length={prefix}}{value}|{units system}|{unit code}
  • length={prefix}}{value}|{units system}|{unit code} & {prefix}}{value}|{units system}|{unit code}
  • length={ge}}{value}|{units system}|{unit code} & {le}}{value}|{units system}|{unit code}


Sample Value: length=gt30|http://unitsofmeasure.org|min & length=lt100|http://unitsofmeasure.org|min



Name:

-include-sources

optional

Type:

formData

Data Type:

array

Description:

The -include-sources parameter defines which sources should be queried for the results.

Note: Either -include-sources or -exclude-sources parameter can be specified, not both. If -include-sources is specified, ONLY the specified sources will be searched. Note that the sources specified should be enabled.


Sample Value: Orion%20Health%5C%5Cu2122%20R4%20HL7V2%20Encounters



Name:

-exclude-sources

optional

Type:

formData

Data Type:

array

Description:

The -exclude-sources parameter defines which sources should NOT be queried for the results.

Note: Either -include-sources or -exclude-sources parameter can be specified, not both. If -exclude-sources is specified, the specified sources will NOT be searched. Note that the sources specified should be enabled.


Sample Value: Orion%20Health%5C%5Cu2122%20R4%20HL7V2%20Encounters



Name:

-cdr-include-cancelled

optional

Type:

formData

Data Type:

string

Description:

The Only supported values for the parameter are "true" or "false". Set to true to return all CDR8 encounters (including the cancelled that are not returned by default).

Note: -cdr-include-cancelled is applicable only for the Encounters CDR8 source, and ignored by other sources.


Sample Value: true



Name:

_summary

optional

Type:

formData

Data Type:

string

Description:

Instructs the server to return a subset of the resource, reducing the size of the reponse payload. Possible values are

  • true: return summaries only
  • false: return full resources
  • count: return the count of search matches
  • text: return only the text, id, meta, and top-level mandatory elements
  • data: remove the text element


Sample Value: true



Name:

_lastUpdated

optional

Type:

formData

Data Type:

array

Description:

Filters based on when the resource version was last changed, before, or after a specific date, date-time, or date range. The supported prefixes are gt, ge, lt, le and eq. If no prefix is used, exact date or date-time matching is implied. Dates must be formatted according to ISO 8601 either as a date only (e.g. 1997-07-16) or as a date-time including the timezone (e.g. 1997-07-16T19:20:30+13:00). Ensure that special characters such as + are URL encoded i.e. %2B.

The format of the query is

  • _lastUpdated=gt{dateTimeValue}
  • _lastUpdated=ge{dateTimeValue}&_lastUpdated=le{dateTimeValue}


Sample Value: ge2012-01-01T01:00:00+13:00



Name:

_elements

optional

Type:

formData

Data Type:

array

Description:

Request a specific set of elements be returned, or excluded as part of a resource in the search results. Use _elements for the elements to include and _elements:exclude for the elements to exclude.


Sample Value: _elements=code,type,status,_elements:exclude=*.extension,*.basedOn



Name:

-cursor

optional

Type:

formData

Data Type:

string

Description:

A server internal parameter to navigate different pages.

This parameter is returned by the server as part of the Bundle 'next' link of a paginated query. And is used to retrieve the next page




Name:

_count

optional

Type:

formData

Data Type:

integer

Description:

Limit the number of match results to the specified _count. When _count is specified, the query will be paginated, and only _count or less results will be returned.

The returned bundle may contain a next link if more results could be available.


Sample Value: 30



Name:

_sort

optional

Type:

formData

Data Type:

array

Description:

Request which order results should be returned in.

Supported _sort parameters are:

  • date to sort by Encounter.period ascending (sorting the Encounter.period.start)
  • -date to sort by Encounter.period descending (sorting the Encounter.period.start)
  • _lastUpdated to sort by Encounter.Meta.lastUpdated ascending
  • -_lastUpdatedto sort by Encounter.Meta.lastUpdated descending

You can use any combination of the parameters


Default Value: -date

Sample Value: _sort=-date,_sort=-date, -_lastUpdated



Name:

X-Request-Id

optional

Type:

header

Data Type:

string

Description:

Supply a request Id to track the request.


Sample Value: adUEctf6urd



Name:

Accept

optional

Type:

header

Data Type:

string

Description:

Media type of the response. Possible values are application/json and application/xml. If both _format and Accept are specified, _format takes precedence.


Default Value: application/json

Sample Value: application/json



Name:

Accept-Language

optional

Type:

header

Data Type:

string

Description:

Specifies the language that the results will be translated to. If not specified it will default to the server's locale. (e.g. fr-FR for french)


Sample Value: en-US



Name:

_format

optional

Type:

formData

Data Type:

string

Description:

Media type of the response. It takes precedence over the Accept header. Possible values are json and xml.


Default Value: json

Sample Value: json



Name:

_pretty

optional

Type:

formData

Data Type:

string

Description:

Ask for a pretty printed response for human convenience.


Default Value: true

Sample Value: true



Name:

CSRF-Token

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. The csrfToken from the OHP session must be included in this header.

System will validate the token and reject the request if the token is invalid or not present.

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.




Name:

X-Send-Open-API

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. This header is required to distinguish the api requests from known senders.

System will validate "X-Send-Open-API" request header is present or not. If it is not present, system will reject the request

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.



Responses


application/json+fhir

200

Returns a FHIR Bundle containing 0..* OperationOutcome resources and 0..* Encounter resources


application/json+fhir

400

This response code is returned when the query is invalid e.g. an invalid parameter or a partial token in the search.

Sample Requests

Retrieve Encounters for a Patient identified by a patient resource id
curl -X POST "https://developer-solution/fhir/4.0/Encounter/_search" \
-H 'Accept: application/json' \
-H 'Authorization: Basic bGV2ZWwxLnN5c19hOk9yaW9uc3k1IT8=' \
-H 'Content-Type: application/x-www-form-urlencoded' \
-d 'patient=IFAUCQJNGAYTENBNHBAE6USJJ5HA'

Retrieve a single Encounter

GET /fhir/4.0/Encounter/{id}

This method returns the Encounter resource matching the requested resource ID.


Parameters

Name

Type

Data Type

Description


Name:

id

required

Type:

path

Data Type:

string

Description:

The id of the Encounter resource


Sample Value: shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ



Name:

_elements

optional

Type:

formData

Data Type:

array

Description:

Request a specific set of elements be returned, or excluded as part of a resource in the search results. Use _elements for the elements to include and _elements:exclude for the elements to exclude.


Sample Value: _elements=code,type,status,_elements:exclude=*.extension,*.basedOn



Name:

X-Request-Id

optional

Type:

header

Data Type:

string

Description:

Supply a request Id to track the request.


Sample Value: adUEctf6urd



Name:

Accept

optional

Type:

header

Data Type:

string

Description:

Media type of the response. Possible values are application/json and application/xml. If both _format and Accept are specified, _format takes precedence.


Default Value: application/json

Sample Value: application/json



Name:

Accept-Language

optional

Type:

header

Data Type:

string

Description:

Specifies the language that the results will be translated to. If not specified it will default to the server's locale. (e.g. fr-FR for french)


Sample Value: en-US



Name:

_format

optional

Type:

formData

Data Type:

string

Description:

Media type of the response. It takes precedence over the Accept header. Possible values are json and xml.


Default Value: json

Sample Value: json



Name:

_pretty

optional

Type:

formData

Data Type:

string

Description:

Ask for a pretty printed response for human convenience.


Default Value: true

Sample Value: true



Name:

CSRF-Token

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. The csrfToken from the OHP session must be included in this header.

System will validate the token and reject the request if the token is invalid or not present.

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.




Name:

X-Send-Open-API

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. This header is required to distinguish the api requests from known senders.

System will validate "X-Send-Open-API" request header is present or not. If it is not present, system will reject the request

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.



Responses


application/json+fhir

200

Returns an Encounter resource matching the requested resource ID.


application/json+fhir

400

This code is returned when the FHIR ID is empty or not valid.


application/json+fhir

404

No Encounter resource found with the requested resource ID.

Sample Requests

Retrieve an Encounter identified by a specific resource id
curl -X GET "https://developer-solution/fhir/4.0/Encounter/shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ" \
-H 'Accept: application/json' \
-H 'Authorization: Basic bGV2ZWwxLnN5c19hOk9yaW9uc3k1IT8='

Retrieve an Encounter's history

GET /fhir/4.0/Encounter/{id}/_history

This method returns the change history for an Encounter resource matching the requested resource ID. Encounter resources can be retrieved from multiple data sources, and not all sources are able to return history information. This operation will return an empty set of data if no versions of the specified Encounter can be found, which includes cases where:

  • The specified Encounter resource cannot be found.
  • The data source for the Encounter is unable to return history information.


Parameters

Name

Type

Data Type

Description


Name:

id

required

Type:

path

Data Type:

string

Description:

The id of the Encounter resource


Sample Value: shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ



Name:

_elements

optional

Type:

query

Data Type:

array

Description:

Request a specific set of elements be returned, or excluded as part of a resource in the search results. Use _elements for the elements to include and _elements:exclude for the elements to exclude.


Sample Value: _elements=code,status,class,_elements:exclude=*.extension,*.basedOn



Name:

X-Request-Id

optional

Type:

header

Data Type:

string

Description:

Supply a request Id to track the request.


Sample Value: adUEctf6urd



Name:

Accept

optional

Type:

header

Data Type:

string

Description:

Media type of the response. Possible values are application/json and application/xml. If both _format and Accept are specified, _format takes precedence.


Default Value: application/json

Sample Value: application/json



Name:

Accept-Language

optional

Type:

header

Data Type:

string

Description:

Specifies the language that the results will be translated to. If not specified it will default to the server's locale. (e.g. fr-FR for french)


Sample Value: en-US



Name:

_format

optional

Type:

query

Data Type:

string

Description:

Media type of the response. It takes precedence over the Accept header. Possible values are json and xml.


Default Value: json

Sample Value: json



Name:

_pretty

optional

Type:

query

Data Type:

string

Description:

Ask for a pretty printed response for human convenience.


Default Value: true

Sample Value: true



Name:

CSRF-Token

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. The csrfToken from the OHP session must be included in this header.

System will validate the token and reject the request if the token is invalid or not present.

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.




Name:

X-Send-Open-API

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. This header is required to distinguish the api requests from known senders.

System will validate "X-Send-Open-API" request header is present or not. If it is not present, system will reject the request

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.



Responses


application/json+fhir

200

Returns a FHIR Bundle containing 1..* Encounter resources matching the requested resource ID.


application/json+fhir

400

  • The source providing the Encounter resource is not capable of returning history of Encounter resources.


application/json+fhir

404

  • No Encounter resource found with the requested resource ID.

Sample Requests

Retrieve the history of an encounter identified a specific resource id
curl -X GET "https://developer-solution/fhir/4.0/Encounter/shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ/_history" \
-H 'Accept: application/json' \
-H 'Authorization: Basic bGV2ZWwxLnN5c19hOk9yaW9uc3k1IT8='

Retrieve a specific version of an Encounter

GET /fhir/4.0/Encounter/{id}/_history/{versionid}

This method returns a specific version of the Encounter resource matching the requested resource ID. Encounter resources can be retrieved from multiple data sources. This operation will return an empty set of data if no versions of the specified Encounter can be found, which includes cases where:

  • The specified Encounter resource cannot be found.


Parameters

Name

Type

Data Type

Description


Name:

id

required

Type:

path

Data Type:

string

Description:

The id of the Encounter resource


Sample Value: shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ



Name:

versionid

required

Type:

path

Data Type:

string

Description:

The version of the Encounter resource


Sample Value: 2



Name:

_elements

optional

Type:

query

Data Type:

array

Description:

Request a specific set of elements be returned, or excluded as part of a resource in the search results. Use _elements for the elements to include and _elements:exclude for the elements to exclude.


Sample Value: _elements=code,status,class,_elements:exclude=*.extension,*.basedOn



Name:

X-Request-Id

optional

Type:

header

Data Type:

string

Description:

Supply a request Id to track the request.


Sample Value: adUEctf6urd



Name:

Accept

optional

Type:

header

Data Type:

string

Description:

Media type of the response. Possible values are application/json and application/xml. If both _format and Accept are specified, _format takes precedence.


Default Value: application/json

Sample Value: application/json



Name:

Accept-Language

optional

Type:

header

Data Type:

string

Description:

Specifies the language that the results will be translated to. If not specified it will default to the server's locale. (e.g. fr-FR for french)


Sample Value: en-US



Name:

_format

optional

Type:

query

Data Type:

string

Description:

Media type of the response. It takes precedence over the Accept header. Possible values are json and xml.


Default Value: json

Sample Value: json



Name:

_pretty

optional

Type:

query

Data Type:

string

Description:

Ask for a pretty printed response for human convenience.


Default Value: true

Sample Value: true



Name:

CSRF-Token

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. The csrfToken from the OHP session must be included in this header.

System will validate the token and reject the request if the token is invalid or not present.

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.




Name:

X-Send-Open-API

required

Type:

header

Data Type:

string

Description:

This header is required for CSRF protection. This header is required to distinguish the api requests from known senders.

System will validate "X-Send-Open-API" request header is present or not. If it is not present, system will reject the request

Note: Either CSRF-Token or X-Send-Open-API must be included in headers to do the CSRF protection.



Responses


application/json+fhir

200

Returns an Encounter resource matching the the requested resource ID and version id.


application/json+fhir

400

  • The source providing the Encounter resource is not capable of returning history of Encounter resources.


application/json+fhir

404

  • No Encounter resource found with the requested resource ID.
  • The version id specified does not exist for the Encounter resource with the requested resource ID.

Sample Requests

Retrieve the version of Encounter identified by a resource id and a version id
curl -X GET "https://developer-solution/fhir/4.0/Encounter/shaO74NZR7CTOEKDLODIFSODJS4DLRWBEJ6XIO4PGOGJDCTSMCWVNSQ/_history/2" \
-H 'Accept: application/json' \
-H 'Authorization: Basic bGV2ZWwxLnN5c19hOk9yaW9uc3k1IT8='