Reference search

Reference describes the relationship between resources. Following options are available for filtering by reference:

[parameter]=[id]
[parameter]=[type]/[id]

For example, let's find all encounters related to a specified patient:

GET /fhir/Encounter?subject=patientid

or

GET /fhir/Encounter?subject=Patient/patientid

Supported modifiers

• identifier - Tests whether the Reference.identifier in a resource (rather than the Reference.reference) matches the supplied parameter value

Example:

// search for observations with a subject containing 
// the identifier 'http://example.org/fhir/mrn|12345'
GET /fhir/Observation?subject:identifier=http://example.org/fhir/mrn|12345

• not - Reverses the code matching: returns all resources that do not have a matching item.

Example:

//Search for any patient with a gender that does not have the code "male"
//Note that for :not, the search does not return any resources that have a gen
GET /fhir/Patient?gender:not=male