http://hl7.org/fhir/StructureDefinition/encounter-modeOfArrival|5.2.0

Identifies whether a patient arrives at the reporting facility via ambulance and the type of ambulance that was used.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/Coding
Extension.value[x].binding.valueSethttp://terminology.hl7.org/ValueSet/v2-0430