ATC classification system

{
  "description" : "Anatomical Therapeutic Chemical (ATC) classification system",
  "date" : "2025-01-07",
  "publisher" : "WHO Collaborating Centre for Drug Statistics Methodology - Norwegian Institute of Public Health",
  "content" : "complete",
  "property" : [ {
    "description" : "Unit of measurement for the DDD (mg, g, mcg, ml, etc.)",
    "type" : "string",
    "code" : "dddUnit"
  }, {
    "description" : "The concept identified is a child of the concept",
    "type" : "code",
    "code" : "child",
    "uri" : "http://hl7.org/fhir/concept-properties#child"
  }, {
    "description" : "The concept identified is a parent of the concept",
    "type" : "code",
    "code" : "parent",
    "uri" : "http://hl7.org/fhir/concept-properties#parent"
  }, {
    "description" : "Administration route code (O=Oral, P=Parenteral, R=Rectal, N=Nasal, TD=Transdermal, V=Vaginal, etc.)",
    "type" : "code",
    "code" : "dddAdmRoute"
  }, {
    "description" : "Qualifier or comment for the DDD entry (e.g., formulation type)",
    "type" : "string",
    "code" : "dddComment"
  }, {
    "description" : "Defined Daily Dose numeric value",
    "type" : "string",
    "code" : "dddValue"
  }, {
    "description" : "Additional detail about the concept",
    "type" : "string",
    "code" : "comment",
    "uri" : "http://hl7.org/fhir/concept-properties#comment"
  } ],
  "name" : "ATC_classification_system",
  "copyright" : "WHO Collaborating Centre for Drug Statistics Methodology, Oslo, Norway.  Use of all or parts of the material requires reference to the WHO Collaborating Centre for Drug Statistics Methodology. Copying and distribution for commercial purposes is not allowed. Changing or manipulating the material is not allowed.",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "ATC classification system",
  "extension" : [ {
    "extension" : [ {
      "valueString" : "concept",
      "url" : "path"
    }, {
      "url" : "count",
      "valueInteger" : 14
    } ],
    "url" : "http://health-samurai.io/extensions/excised-data"
  }, {
    "url" : "http://health-samurai.io/extensions/source",
    "valueCode" : "db"
  } ],
  "status" : "active",
  "hierarchyMeaning" : "is-a",
  "id" : "atc",
  "count" : 6897,
  "url" : "http://www.whocc.no/atc",
  "identifier" : [ {
    "system" : "urn:ietf:rfc:3986",
    "use" : "official",
    "value" : "urn:oid:2.16.840.1.113883.6.73"
  } ],
  "caseSensitive" : true,
  "version" : "2025",
  "contact" : [ {
    "name" : "WHO Collaborating Centre for Drug Statistics Methodology - Norwegian Institute of Public Health",
    "telecom" : [ {
      "system" : "url",
      "value" : "http://www.whocc.no"
    } ]
  } ]
}