{
  "resourceType": "ValueSet",
  "status": "draft",
  "name": "AllNullFlavorVS",
  "id": "all-null-flavor",
  "title": "HL7 NullFlavor codes -- all codes",
  "description": "HL7 NullFlavor codes -- the vocabulary for saying WHY a value is missing rather than leaving it\nmissing: `ASKU` (asked but unknown), `UNK` (unknown), `OTH` (other), `NAVU` (not available).\n\nThis specification reaches for it in the sociodemographic value sets -- indigenous identity,\nracialized group -- where a patient declining to answer, or an answer that falls outside the set,\nmust be recordable as the absence it is. Coding a decline as an ethnicity is the failure mode these\ncodes exist to prevent.\n\nPublished by **HL7 International** as part of HL7 Terminology (THO), originating in the HL7 v3\nvocabulary. Browse it at <https://terminology.hl7.org/CodeSystem-v3-NullFlavor.html>. THO is made\navailable under the CC0 designation; see <https://terminology.hl7.org/license.html>.\n\nThe canonical URI is `http://terminology.hl7.org/CodeSystem/v3-NullFlavor`.\n\n**The set enumerates no codes of its own.** It includes the whole system, so it means every code in it, and it exists so the system URI resolves to a definition rather than to nothing. The definition itself stays with the publisher at the canonical above: this specification does not redefine the system and does not restrict it. Where this page shows a list of codes, that list is a SAMPLE reproduced under the publisher's own terms and is not the set's content -- the page says how many of how many it is showing.",
  "url": "https://fhir.apps.health/ValueSet/all-null-flavor",
  "experimental": false,
  "date": "2026-08-22",
  "publisher": "WELLSTAR Technologies Corp.",
  "copyright": "This material derives from HL7 Terminology (THO). THO is copyright (c) 1989+ Health Level Seven International and is made available under the CC0 designation (https://terminology.hl7.org/license.html). This value set enumerates no codes.",
  "compose": {
    "include": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/v3-NullFlavor"
      }
    ]
  }
}