http://hl7.org/fhir/StructureDefinition/patient-contactPriority|5.2.0

The order in which contacts for a patient should be used. For example, if a patient has multiple people listed as an emergency contact, which of those should be called first in an emergency.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/positiveInt