[
  {
    "phenotype_id": "PH3981",
    "phenotype_version_id": 9178,
    "name": "dementia",
    "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\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": "2026-01-26T23:42:03.999976Z",
    "author": "QMUL Multimorbidity",
    "collections": [
      {
        "name": "OpenCodelist",
        "value": 31
      },
      {
        "name": "Phenotype Library",
        "value": 18
      }
    ],
    "tags": null,
    "organisation": {
      "id": 1,
      "slug": "opensafely",
      "name": "OpenSAFELY"
    },
    "world_access": 1,
    "updated": "2026-01-26T23:42:03.994312Z",
    "references": [],
    "signed_off": [],
    "methodology": "",
    "coding_system": [
      {
        "name": "Read codes v2",
        "value": 5
      }
    ],
    "open_codelist_id": "qmul-multimorbidity/dementia",
    "source_reference": "https://www.opencodelists.org/codelist/qmul-multimorbidity/dementia/0cada342",
    "concept_information": [
      {
        "concept_id": 9355,
        "concept_version_id": 16840,
        "concept_name": "qmul-multimorbidity/dementia/0cada342",
        "coding_system": {
          "id": 5,
          "name": "Read codes v2",
          "description": "Read codes v2"
        },
        "phenotype_id": "PH3981",
        "phenotype_version_id": 9178,
        "phenotype_name": "dementia",
        "code_attribute_header": [
          "Medcode",
          "ReadcodeDescr",
          "Category",
          "CodingSystem",
          "Provenance"
        ],
        "codes": [
          {
            "code": "1461.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "5931",
              "ReadcodeDescr": "H/O: dementia",
              "Category": "History of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "66h..00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "55023",
              "ReadcodeDescr": "Dementia monitoring",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "6AB..00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "12710",
              "ReadcodeDescr": "Dementia annual review",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "8CMZ.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "106311",
              "ReadcodeDescr": "Dementia care plan",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9hD..00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "44341",
              "ReadcodeDescr": "Exception reporting: dementia quality indicators",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9hD0.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "30641",
              "ReadcodeDescr": "Excepted from dementia quality indicators: Patient unsuitabl",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9hD1.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "40805",
              "ReadcodeDescr": "Excepted from dementia quality indicators: Informed dissent",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9Ou..00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "85853",
              "ReadcodeDescr": "Dementia monitoring administration",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9Ou1.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "49674",
              "ReadcodeDescr": "Dementia monitoring first letter",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9Ou2.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "83576",
              "ReadcodeDescr": "Dementia monitoring second letter",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9Ou3.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "89036",
              "ReadcodeDescr": "Dementia monitoring third letter",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9Ou4.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "89037",
              "ReadcodeDescr": "Dementia monitoring verbal invite",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "9Ou5.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "65235",
              "ReadcodeDescr": "Dementia monitoring telephone invite",
              "Category": "History of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "E00..00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "33707",
              "ReadcodeDescr": "Senile and presenile organic psychotic conditions",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E000.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "7323",
              "ReadcodeDescr": "Uncomplicated senile dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E001.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "15165",
              "ReadcodeDescr": "Presenile dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E001000",
            "description": "Dementia",
            "attributes": {
              "Medcode": "42602",
              "ReadcodeDescr": "Uncomplicated presenile dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E00..11",
            "description": "Dementia",
            "attributes": {
              "Medcode": "1916",
              "ReadcodeDescr": "Senile dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E001100",
            "description": "Dementia",
            "attributes": {
              "Medcode": "49513",
              "ReadcodeDescr": "Presenile dementia with delirium",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E00..12",
            "description": "Dementia",
            "attributes": {
              "Medcode": "1350",
              "ReadcodeDescr": "Senile/presenile dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E001200",
            "description": "Dementia",
            "attributes": {
              "Medcode": "30032",
              "ReadcodeDescr": "Presenile dementia with paranoia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E001300",
            "description": "Dementia",
            "attributes": {
              "Medcode": "27677",
              "ReadcodeDescr": "Presenile dementia with depression",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E001z00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "38438",
              "ReadcodeDescr": "Presenile dementia NOS",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E002.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "44674",
              "ReadcodeDescr": "Senile dementia with depressive or paranoid features",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E002000",
            "description": "Dementia",
            "attributes": {
              "Medcode": "18386",
              "ReadcodeDescr": "Senile dementia with paranoia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E002100",
            "description": "Dementia",
            "attributes": {
              "Medcode": "21887",
              "ReadcodeDescr": "Senile dementia with depression",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E002z00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "41089",
              "ReadcodeDescr": "Senile dementia with depressive or paranoid features NOS",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E003.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "37015",
              "ReadcodeDescr": "Senile dementia with delirium",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "19477",
              "ReadcodeDescr": "Arteriosclerotic dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004000",
            "description": "Dementia",
            "attributes": {
              "Medcode": "43089",
              "ReadcodeDescr": "Uncomplicated arteriosclerotic dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004100",
            "description": "Dementia",
            "attributes": {
              "Medcode": "56912",
              "ReadcodeDescr": "Arteriosclerotic dementia with delirium",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004.11",
            "description": "Dementia",
            "attributes": {
              "Medcode": "8634",
              "ReadcodeDescr": "Multi infarct dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004200",
            "description": "Dementia",
            "attributes": {
              "Medcode": "55467",
              "ReadcodeDescr": "Arteriosclerotic dementia with paranoia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004300",
            "description": "Dementia",
            "attributes": {
              "Medcode": "43292",
              "ReadcodeDescr": "Arteriosclerotic dementia with depression",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E004z00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "42279",
              "ReadcodeDescr": "Arteriosclerotic dementia NOS",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "E00y.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "15249",
              "ReadcodeDescr": "Other senile and presenile organic psychoses",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "E00y.11",
            "description": "Dementia",
            "attributes": {
              "Medcode": "51494",
              "ReadcodeDescr": "Presbyophrenic psychosis",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "E00z.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "2882",
              "ReadcodeDescr": "Senile or presenile psychoses NOS",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "None",
              "Provenance": "Kuan"
            }
          },
          {
            "code": "E012.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "54505",
              "ReadcodeDescr": "Other alcoholic dementia",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "E012.11",
            "description": "Dementia",
            "attributes": {
              "Medcode": "27342",
              "ReadcodeDescr": "Alcoholic dementia NOS",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "E041.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "25386",
              "ReadcodeDescr": "Dementia in conditions EC",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "7664",
              "ReadcodeDescr": "[X]Dementia in Alzheimer's disease",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00000",
            "description": "Dementia",
            "attributes": {
              "Medcode": "49263",
              "ReadcodeDescr": "[X]Dementia in Alzheimer's disease with early onset",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00011",
            "description": "Dementia",
            "attributes": {
              "Medcode": "25704",
              "ReadcodeDescr": "[X]Presenile dementia,Alzheimer's type",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00012",
            "description": "Dementia",
            "attributes": {
              "Medcode": "60059",
              "ReadcodeDescr": "[X]Primary degen dementia, Alzheimer's type, presenile onset",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00013",
            "description": "Dementia",
            "attributes": {
              "Medcode": "61528",
              "ReadcodeDescr": "[X]Alzheimer's disease type 2",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00100",
            "description": "Dementia",
            "attributes": {
              "Medcode": "38678",
              "ReadcodeDescr": "[X]Dementia in Alzheimer's disease with late onset",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00111",
            "description": "Dementia",
            "attributes": {
              "Medcode": "46762",
              "ReadcodeDescr": "[X]Alzheimer's disease type 1",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00112",
            "description": "Dementia",
            "attributes": {
              "Medcode": "11379",
              "ReadcodeDescr": "[X]Senile dementia,Alzheimer's type",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00113",
            "description": "Dementia",
            "attributes": {
              "Medcode": "43346",
              "ReadcodeDescr": "[X]Primary degen dementia of Alzheimer's type, senile onset",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00200",
            "description": "Dementia",
            "attributes": {
              "Medcode": "30706",
              "ReadcodeDescr": "[X]Dementia in Alzheimer's dis, atypical or mixed type",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00z00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "29386",
              "ReadcodeDescr": "[X]Dementia in Alzheimer's disease, unspecified",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu00z11",
            "description": "Dementia",
            "attributes": {
              "Medcode": "8195",
              "ReadcodeDescr": "[X]Alzheimer's dementia unspec",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "6578",
              "ReadcodeDescr": "[X]Vascular dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01000",
            "description": "Dementia",
            "attributes": {
              "Medcode": "46488",
              "ReadcodeDescr": "[X]Vascular dementia of acute onset",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01100",
            "description": "Dementia",
            "attributes": {
              "Medcode": "11175",
              "ReadcodeDescr": "[X]Multi-infarct dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01.11",
            "description": "Dementia",
            "attributes": {
              "Medcode": "9565",
              "ReadcodeDescr": "[X]Arteriosclerotic dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01111",
            "description": "Dementia",
            "attributes": {
              "Medcode": "55838",
              "ReadcodeDescr": "[X]Predominantly cortical dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01200",
            "description": "Dementia",
            "attributes": {
              "Medcode": "8934",
              "ReadcodeDescr": "[X]Subcortical vascular dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01300",
            "description": "Dementia",
            "attributes": {
              "Medcode": "31016",
              "ReadcodeDescr": "[X]Mixed cortical and subcortical vascular dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01y00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "55313",
              "ReadcodeDescr": "[X]Other vascular dementia",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu01z00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "19393",
              "ReadcodeDescr": "[X]Vascular dementia, unspecified",
              "Category": "Diagnosis of Dementia",
              "CodingSystem": "readcode",
              "Provenance": "Kuan and Cambridge"
            }
          },
          {
            "code": "Eu02.00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "12621",
              "ReadcodeDescr": "[X]Dementia in other diseases classified elsewhere",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02000",
            "description": "Dementia",
            "attributes": {
              "Medcode": "28402",
              "ReadcodeDescr": "[X]Dementia in Pick's disease",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02100",
            "description": "Dementia",
            "attributes": {
              "Medcode": "54106",
              "ReadcodeDescr": "[X]Dementia in Creutzfeldt-Jakob disease",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02200",
            "description": "Dementia",
            "attributes": {
              "Medcode": "37014",
              "ReadcodeDescr": "[X]Dementia in Huntington's disease",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02300",
            "description": "Dementia",
            "attributes": {
              "Medcode": "9509",
              "ReadcodeDescr": "[X]Dementia in Parkinson's disease",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02400",
            "description": "Dementia",
            "attributes": {
              "Medcode": "41185",
              "ReadcodeDescr": "[X]Dementia in human immunodef virus [HIV] disease",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02500",
            "description": "Dementia",
            "attributes": {
              "Medcode": "26270",
              "ReadcodeDescr": "[X]Lewy body dementia",
              "Category": "None",
              "CodingSystem": "readcode",
              "Provenance": "Cambridge"
            }
          },
          {
            "code": "Eu02y00",
            "description": "Dementia",
            "attributes": {
              "Medcode": "64267",
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