[
  {
    "phenotype_id": "PH3565",
    "phenotype_version_id": 8639,
    "name": "Methotrexate (oral)",
    "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\ndm\\+d codelist for oral methotrexate\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": "2026-01-26T23:22:20.265018Z",
    "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": "2026-01-26T23:22:23.845211Z",
    "references": [
      {
        "url": "https://doi.org/10.3399/bjgp20X710993",
        "title": "BJGP: Trends and variation in unsafe prescribing of methotrexate"
      },
      {
        "url": "https://github.com/opensafely/immunosuppressant-meds-research/issues/77",
        "title": "GitHub Discussion"
      }
    ],
    "signed_off": [],
    "methodology": "This codelist was developed based on methodology used in the DataLab paper on trends and variation in unsafe prescribing of methotrexate published in the British Journal of General Practice. All oral methotrexate preparations from chapter 10 of BNF codes were included although the vast majority of prescriptions will be for tablets. You can view the [BNF codelist version here](https://codelists.opensafely.org/codelist/opensafely/methotrexate-oral-bnf/3eb9b7b2/)\n\n",
    "coding_system": [
      {
        "name": "dm+d codes",
        "value": 23
      }
    ],
    "open_codelist_id": "opensafely/methotrexate-oral",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/methotrexate-oral/26ee05e8",
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        "concept_version_id": 16301,
        "concept_name": "opensafely/methotrexate-oral/26ee05e8",
        "coding_system": {
          "id": 23,
          "name": "dm+d codes",
          "description": "dm+d codes"
        },
        "phenotype_id": "PH3565",
        "phenotype_version_id": 8639,
        "phenotype_name": "Methotrexate (oral)",
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        ],
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