{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "A substance that causes an allergic reaction.",
  "system" : "http://terminology.hl7.org/CodeSystem/substance-category",
  "property" : [ ],
  "codesystem" : "c0804701-d81a-5ef0-af05-f7a63e992dc7",
  "concept_id" : "ecb9fd1a-a22e-56db-87b9-a34699e90670",
  "ancestors" : {
    "allergen" : 0
  },
  "id" : "913b3c0e-d64f-44c2-81b7-8f231fb5e6b4",
  "code" : "allergen",
  "display" : "Allergen",
  "version" : "4.0.1"
}