description: The US Core Immunization Profile inherits from the FHIR [Immunization](https://hl7.org/fhir/R4/immunization.html) resource; refer to it for scope and usage definitions. This profile sets minimum expectations for the Immunization resource to record, search, and fetch immunization history associated with a patient. It specifies which core elements, extensions, vocabularies, and value sets **SHALL** be present and constrains how the elements are used. Providing the floor for standards development for specific use cases promotes interoperability and adoption. package_name: hl7.fhir.us.core derivation: constraint name: USCoreImmunizationProfile type: Immunization elements: patient: type: Reference mustSupport: true refers: ['http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient'] index: 3 encounter: type: Reference short: Encounter the immunization was part of mustSupport: true refers: ['http://hl7.org/fhir/us/core/StructureDefinition/us-core-encounter'] index: 4 vaccineCode: short: Vaccine Product Type (bind to CVX) binding: {strength: extensible, valueSet: 'http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1010.6'} mustSupport: true index: 2 statusReason: binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/immunization-status-reason'} mustSupport: true index: 1 primarySource: {mustSupport: true, index: 9} status: binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/immunization-status'} mustSupport: true index: 0 occurrenceString: {type: string, mustSupport: true, choiceOf: occurrence, index: 8} location: type: Reference short: Where the vaccine was administered mustSupport: true refers: ['http://hl7.org/fhir/us/core/StructureDefinition/us-core-location'] index: 10 occurrenceDateTime: {type: dateTime, mustSupport: true, choiceOf: occurrence, index: 7} occurrence: mustSupport: true choices: [occurrenceDateTime, occurrenceString] index: 6 package_version: 7.0.0 class: profile kind: resource url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-immunization base: http://hl7.org/fhir/StructureDefinition/Immunization version: 7.0.0