description: Sometimes a referral needs to communicate where the patient is at the time of the referral (e.g., in Ward X of Hospital Y), which may be different from the patient's home address. To communicate this, use this extension, which references a Location resource.  Present location can be nested using Location.partOf to communicate locations with multiple levels, e.g., Location.partOf > Location for WardX > HospitalY.
package_name: ca.infoway.io.erec
derivation: constraint
name: PatientPresentLocation
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://fhir.infoway-inforoute.ca/io/CA-eReC/StructureDefinition/CA-eReC-Patient-Present-Location-EXT'}
    index: 1
  value:
    choices: [valueReference]
    index: 3
  valueReference:
    type: Reference
    choiceOf: value
    refers: ['http://fhir.infoway-inforoute.ca/io/CA-eReC/StructureDefinition/CA-eReC-Location']
    index: 4
package_version: 1.1.0-dft
extensions: {}
class: extension
kind: complex-type
url: http://fhir.infoway-inforoute.ca/io/CA-eReC/StructureDefinition/CA-eReC-Patient-Present-Location-EXT
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null