[
  {
    "phenotype_id": "PH3435",
    "phenotype_version_id": 8474,
    "name": "Glycated haemoglobin (HbA1c) tests (numerical value)",
    "definition": "This codelist was taken from [OpenCodelists](https://www.opencodelists.org/), created by [OpenSAFELY](https://www.opensafely.org/). We recommend viewing this Phenotype on the OpenCodelist website to view the most recent version.\n\n\nA SNOMED CT codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests, which contains a numerical value using the newer IFCC units.\n\n\n© University of Oxford for the Bennett Institute for Applied Data Science 2025\\. This work may be copied freely for non\\-commercial research and study.\n\n",
    "implementation": null,
    "publications": null,
    "validation": null,
    "citation_requirements": null,
    "created": "2026-01-26T23:17:24.624599Z",
    "author": "OpenSAFELY",
    "collections": [
      {
        "name": "OpenCodelist",
        "value": 31
      },
      {
        "name": "Phenotype Library",
        "value": 18
      }
    ],
    "tags": null,
    "organisation": {
      "id": 1,
      "slug": "opensafely",
      "name": "OpenSAFELY"
    },
    "world_access": 1,
    "updated": "2026-01-26T23:17:24.617670Z",
    "references": [],
    "signed_off": [],
    "methodology": "We identified the full set of HbA1c level codes (see HbA1c codelist), and excluded any codes which did not have a numerical value recorded in at least 95% of coded activity.\n\n\nThe older % measurement was excluded from this codelist, as a) the majority of patients who have this code receive the newer IFCC measurement on the same day, and b) the units are very different, making comparisons difficult.\n\n",
    "coding_system": [
      {
        "name": "SNOMED  CT codes",
        "value": 9
      }
    ],
    "open_codelist_id": "opensafely/glycated-haemoglobin-hba1c-tests-numerical-value",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/glycated-haemoglobin-hba1c-tests-numerical-value/5134e926",
    "concept_information": [
      {
        "concept_id": 8651,
        "concept_version_id": 16136,
        "concept_name": "opensafely/glycated-haemoglobin-hba1c-tests-numerical-value/5134e926",
        "coding_system": {
          "id": 9,
          "name": "SNOMED  CT codes",
          "description": "SNOMED CT codes"
        },
        "phenotype_id": "PH3435",
        "phenotype_version_id": 8474,
        "phenotype_name": "Glycated haemoglobin (HbA1c) tests (numerical value)",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "999791000000106",
            "description": "Haemoglobin A1c level - International Federation of Clinical Chemistry and Laboratory Medicine standardised",
            "attributes": null
          }
        ]
      }
    ],
    "coding_system_release": "",
    "open_codelist_version_id": "5134e926",
    "open_codelist_version_tag": "",
    "status": 1,
    "doi": "https://doi.org/10.48533/ah4h-7619",
    "is_deleted": false,
    "publish_status": 2,
    "owner": "ieuan.scanlon",
    "template": {
      "id": 3,
      "name": "OpenCodelists Phenotype",
      "description": "OpenSafely's OpenCodelist Phenotype, visit https://www.opencodelists.org/ to learn more",
      "version_id": 1
    },
    "versions": [
      {
        "version_id": 8474,
        "version_name": "Glycated haemoglobin (HbA1c) tests (numerical value)",
        "version_date": "2026-01-26T23:17:24.630652Z",
        "is_published": true,
        "is_latest": true
      }
    ]
  }
]