Definition for Code SystemMedicationUsage Adherence Codes

{
  "resourceType" : "CodeSystem",
  "id" : "medication-usage-adherence",
  "meta" : {
    "lastUpdated" : "2022-09-07T10:58:29.429+10:00",
    "profile" : ["http://hl7.org/fhir/StructureDefinition/shareablecodesystem"]
  },
  "text" : {
    "status" : "generated",
    "div" : "<div>!-- Snipped for Brevity --></div>"
  },
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "phx"
  }],
  "url" : "http://hl7.org/fhir/CodeSystem/medication-usage-adherence",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.642.4.1981"
  }],
  "version" : "5.0.0-ballot",
  "name" : "MedicationUsage Adherence Codes",
  "status" : "draft",
  "experimental" : false,
  "caseSensitive" : true,
  "valueSet" : "http://hl7.org/fhir/ValueSet/medication-usage-adherence",
  "hierarchyMeaning" : "is-a",
  "content" : "complete",
  "concept" : [{
    "code" : "taking",
    "display" : "Taking",
    "definition" : "The medication is being taken.",
    "concept" : [{
      "code" : "taking-as-directed",
      "display" : "Taking As Directed",
      "definition" : "The medication is being taken as directed."
    },
    {
      "code" : "taking-not-as-directed",
      "display" : "Taking Not As Directed",
      "definition" : "The medication is not being taken as directed."
    }]
  },
  {
    "code" : "not-taking",
    "display" : "Not Taking",
    "definition" : "The medication is not being taken."
  },
  {
    "code" : "unknown",
    "display" : "Unknown",
    "definition" : "Whether the medication is being taken or not is not currently known."
  }]
}