[
  {
    "phenotype_id": "PH3761",
    "phenotype_version_id": 8902,
    "name": "Symptoms: hair loss",
    "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\nCode list aiming to identify individuals consulting complaining of hair loss.\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": "2026-01-26T23:33:18.742461Z",
    "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": "2026-01-26T23:33:19.976776Z",
    "references": [],
    "signed_off": [],
    "methodology": "Identified from intial search terms outside of OpenCodelists: \"hair loss\" \"loss hair\" \"hair fall\" \"alopecia\" bald\" \"losing hair\" \"thin hair\" \"hair thin\" atrichosis\" \"thin hair\" \"telogen effluvium\" fall hair\" \"\n\n\nClearly irrelevant codes excluded (not reviewed by a second clinician)\n\n\nCandidate codelist uploaded to OpenCodelists for review of candidate codes.\n\n\nSpecifically excluded post\\-partum hair loss and hair loss related to trauma, as these imply a clear cause.\n\n",
    "coding_system": [
      {
        "name": "SNOMED  CT codes",
        "value": 9
      }
    ],
    "open_codelist_id": "opensafely/symptoms-hair-loss",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/symptoms-hair-loss/042e6be8",
    "concept_information": [
      {
        "concept_id": 9079,
        "concept_version_id": 16564,
        "concept_name": "opensafely/symptoms-hair-loss/042e6be8",
        "coding_system": {
          "id": 9,
          "name": "SNOMED  CT codes",
          "description": "SNOMED CT codes"
        },
        "phenotype_id": "PH3761",
        "phenotype_version_id": 8902,
        "phenotype_name": "Symptoms: hair loss",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "100071000000104",
            "description": "C/O: hair loss",
            "attributes": null
          },
          {
            "code": "109441000119102",
            "description": "Central centrifugal cicatricial alopecia",
            "attributes": null
          },
          {
            "code": "111024006",
            "description": "Alopecia liminaris frontalis",
            "attributes": null
          },
          {
            "code": "140017009",
            "description": "O/E - loss of hair",
            "attributes": null
          },
          {
            "code": "140020001",
            "description": "O/E - alopecia (& patches of)",
            "attributes": null
          },
          {
            "code": "140022009",
            "description": "O/E - loss of body hair",
            "attributes": null
          },
          {
            "code": "140023004",
            "description": "O/E - balding",
            "attributes": null
          },
          {
            "code": "156408004",
            "description": "Alopecia",
            "attributes": null
          },
          {
            "code": "162797000",
            "description": "On examination - loss of hair",
            "attributes": null
          },
          {
            "code": "162800003",
            "description": "O/E - alopecia (& patches of)",
            "attributes": null
          },
          {
            "code": "162803001",
            "description": "On examination - loss of body hair",
            "attributes": null
          },
          {
            "code": "162804007",
            "description": "On examination - balding",
            "attributes": null
          },
          {
            "code": "19754005",
            "description": "Alopecia totalis",
            "attributes": null
          },
          {
            "code": "201129005",
            "description": "(Alopecia) or (thinning of hair)",
            "attributes": null
          },
          {
            "code": "201130000",
            "description": "(Alopecia unspecified) or (baldness) or (hair loss)",
            "attributes": null
          },
          {
            "code": "201132008",
            "description": "Frontal alopecia of women",
            "attributes": null
          },
          {
            "code": "201133003",
            "description": "Premature alopecia",
            "attributes": null
          },
          {
            "code": "201135005",
            "description": "Alopecia senilis",
            "attributes": null
          },
          {
            "code": "201136006",
            "description": "Alopecia febrilis",
            "attributes": null
          },
          {
            "code": "201137002",
            "description": "Alopecia localis",
            "attributes": null
          },
          {
            "code": "201138007",
            "description": "Diffuse alopecia",
            "attributes": null
          },
          {
            "code": "201142005",
            "description": "Peroneal alopecia",
            "attributes": null
          },
          {
            "code": "201145007",
            "description": "Alopecia universalis",
            "attributes": null
          },
          {
            "code": "201147004",
            "description": "Telogen effluvium",
            "attributes": null
          },
          {
            "code": "201157003",
            "description": "Alopecia NOS",
            "attributes": null
          },
          {
            "code": "201397005",
            "description": "[X]Other specified nonscarring hair loss",
            "attributes": null
          },
          {
            "code": "238469005",
            "description": "Friction alopecia",
            "attributes": null
          },
          {
            "code": "238725004",
            "description": "Non-scarring alopecia",
            "attributes": null
          },
          {
            "code": "238727007",
            "description": "Circumscribed alopecia",
            "attributes": null
          },
          {
            "code": "238731001",
            "description": "Pseudopelade",
            "attributes": null
          },
          {
            "code": "247541001",
            "description": "Partial loss of hair",
            "attributes": null
          },
          {
            "code": "267810004",
            "description": "Alopecia unspecified",
            "attributes": null
          },
          {
            "code": "268921005",
            "description": "On examination - patches of alopecia",
            "attributes": null
          },
          {
            "code": "270504008",
            "description": "Alopecia",
            "attributes": null
          },
          {
            "code": "27382006",
            "description": "Alopecia mucinosa",
            "attributes": null
          },
          {
            "code": "275950000",
            "description": "On examination - alopecia",
            "attributes": null
          },
          {
            "code": "278040002",
            "description": "Loss of hair",
            "attributes": null
          },
          {
            "code": "282286008",
            "description": "Temporal hair recession",
            "attributes": null
          },
          {
            "code": "283872008",
            "description": "Loss of outer third of eyebrow",
            "attributes": null
          },
          {
            "code": "298000004",
            "description": "Loss of scalp hair",
            "attributes": null
          },
          {
            "code": "298001000",
            "description": "Loss of body hair",
            "attributes": null
          },
          {
            "code": "299671008",
            "description": "Loss of axillary hair",
            "attributes": null
          },
          {
            "code": "299672001",
            "description": "Loss of pubic hair",
            "attributes": null
          },
          {
            "code": "299674000",
            "description": "Patchy loss of scalp hair",
            "attributes": null
          },
          {
            "code": "299675004",
            "description": "Diffuse loss of scalp hair",
            "attributes": null
          },
          {
            "code": "39479004",
            "description": "Telogen effluvium",
            "attributes": null
          },
          {
            "code": "400088006",
            "description": "Scarring alopecia",
            "attributes": null
          },
          {
            "code": "402350005",
            "description": "Cicatricial alopecia due to lichen planus of scalp",
            "attributes": null
          },
          {
            "code": "402637002",
            "description": "Alopecia due to disturbance of hair cycle",
            "attributes": null
          },
          {
            "code": "403320008",
            "description": "Circumscribed alopecia areata of scalp",
            "attributes": null
          },
          {
            "code": "403321007",
            "description": "Circumscribed alopecia areata of eyelashes/eyebrows",
            "attributes": null
          },
          {
            "code": "403322000",
            "description": "Circumscribed alopecia areata of beard area",
            "attributes": null
          },
          {
            "code": "403323005",
            "description": "Circumscribed alopecia areata of limbs",
            "attributes": null
          },
          {
            "code": "403324004",
            "description": "Circumscribed alopecia areata of trunk",
            "attributes": null
          },
          {
            "code": "403325003",
            "description": "Postmenopausal frontal fibrosing alopecia",
            "attributes": null
          },
          {
            "code": "403328001",
            "description": "Chronic telogen effluvium",
            "attributes": null
          },
          {
            "code": "403335009",
            "description": "Chronic diffuse alopecia",
            "attributes": null
          },
          {
            "code": "407551001",
            "description": "Complaining of hair loss",
            "attributes": null
          },
          {
            "code": "463541000000108",
            "description": "[X]Other specified nonscarring hair loss",
            "attributes": null
          },
          {
            "code": "46586006",
            "description": "Diffuse alopecia areata",
            "attributes": null
          },
          {
            "code": "56317004",
            "description": "Alopecia",
            "attributes": null
          },
          {
            "code": "5860009",
            "description": "Ophiasis",
            "attributes": null
          },
          {
            "code": "59817009",
            "description": "Postinfectional hypotrichosis",
            "attributes": null
          },
          {
            "code": "65384007",
            "description": "Psychogenic alopecia",
            "attributes": null
          },
          {
            "code": "680001000000107",
            "description": "Alopecia NOS",
            "attributes": null
          },
          {
            "code": "68225006",
            "description": "Alopecia areata",
            "attributes": null
          },
          {
            "code": "685031000000109",
            "description": "Alopecia unspecified",
            "attributes": null
          },
          {
            "code": "717055000",
            "description": "Frontal fibrosing alopecia",
            "attributes": null
          },
          {
            "code": "723005006",
            "description": "Acute telogen effluvium",
            "attributes": null
          },
          {
            "code": "77363004",
            "description": "Concentric alopecia areata",
            "attributes": null
          },
          {
            "code": "85661000000104",
            "description": "C/O: hair loss",
            "attributes": null
          },
          {
            "code": "86166000",
            "description": "Alopecia universalis",
            "attributes": null
          }
        ]
      }
    ],
    "coding_system_release": "",
    "open_codelist_version_id": "042e6be8",
    "open_codelist_version_tag": "",
    "status": 1,
    "doi": "https://doi.org/10.48533/mpxn-1024",
    "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": 8902,
        "version_name": "Symptoms: hair loss",
        "version_date": "2026-01-26T23:33:19.990234Z",
        "is_published": true,
        "is_latest": true
      },
      {
        "version_id": 8901,
        "version_name": "Symptoms: hair loss",
        "version_date": "2026-01-26T23:33:18.750070Z",
        "is_published": true,
        "is_latest": false
      }
    ]
  }
]