[
  {
    "phenotype_id": "PH3775",
    "phenotype_version_id": 8922,
    "name": "Symptoms: weight loss and reduced appetite",
    "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 weight loss or reduced appetite.\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": "2026-01-26T23:34:05.580260Z",
    "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": "2026-01-26T23:34:05.571595Z",
    "references": [],
    "signed_off": [],
    "methodology": "Identified from intial search terms outside of OpenCodelists: \"weight loss\" \"weight reduc\" \"anorexi\" \"appetite\" \"underweight\" \"lost weight\" \"loosing weight\" \"off food\" \"interest in food\"\n\n\nClearly irrelevant codes excluded (with review by a second clinician)\n\n\nCandidate codelist reviewed outside OpenCodelists by two clinicians. As we reviewed our candidate codelist outside openCodelists, we did not benefit from the tree structures that might have identified additional codes. However, we assume that these are likely to be codes that are not used frequently, e.g., eponymous syndromes.\n\n\nExcluded ambiguous 'change in appetite' codes as these may represent increased as well as decreased appetite.\nExcluded codes that clearly represented eating disorders. Although retained anorexia codes as they do not necessarily represent anorexia nervosa.\n\n",
    "coding_system": [
      {
        "name": "SNOMED  CT codes",
        "value": 9
      }
    ],
    "open_codelist_id": "opensafely/symptoms-weight-loss-and-reduced-appetite",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/symptoms-weight-loss-and-reduced-appetite/7e02386c",
    "concept_information": [
      {
        "concept_id": 9099,
        "concept_version_id": 16584,
        "concept_name": "opensafely/symptoms-weight-loss-and-reduced-appetite/7e02386c",
        "coding_system": {
          "id": 9,
          "name": "SNOMED  CT codes",
          "description": "SNOMED CT codes"
        },
        "phenotype_id": "PH3775",
        "phenotype_version_id": 8922,
        "phenotype_name": "Symptoms: weight loss and reduced appetite",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "104301000000104",
            "description": "[D]Underweight",
            "attributes": null
          },
          {
            "code": "139082003",
            "description": "Appetite loss: [anorexia] or [anorexia symptom]",
            "attributes": null
          },
          {
            "code": "139091004",
            "description": "Weight loss (& abnormal)",
            "attributes": null
          },
          {
            "code": "158268008",
            "description": "[D]Anorexia",
            "attributes": null
          },
          {
            "code": "158269000",
            "description": "[D]Appetite loss",
            "attributes": null
          },
          {
            "code": "158272007",
            "description": "[D]Anorexia NOS",
            "attributes": null
          },
          {
            "code": "161826006",
            "description": "Appetite loss: [anorexia] or [anorexia symptom]",
            "attributes": null
          },
          {
            "code": "161832001",
            "description": "Weight decreasing",
            "attributes": null
          },
          {
            "code": "161834000",
            "description": "Abnormal weight loss (& [symptom])",
            "attributes": null
          },
          {
            "code": "162769006",
            "description": "On examination - Underweight",
            "attributes": null
          },
          {
            "code": "192017004",
            "description": "Non-organic loss of appetite",
            "attributes": null
          },
          {
            "code": "192451007",
            "description": "[X] Eating disorders: [other] or [pica in adults] or [psychogenic loss of appetite]",
            "attributes": null
          },
          {
            "code": "198511000000103",
            "description": "Complaining of weight loss",
            "attributes": null
          },
          {
            "code": "206915006",
            "description": "[D]Anorexia",
            "attributes": null
          },
          {
            "code": "206916007",
            "description": "[D]Appetite loss",
            "attributes": null
          },
          {
            "code": "206917003",
            "description": "[D]Anorexia NOS",
            "attributes": null
          },
          {
            "code": "213791000000109",
            "description": "Complaining of weight loss",
            "attributes": null
          },
          {
            "code": "213801000000108",
            "description": "Complaining of weight loss",
            "attributes": null
          },
          {
            "code": "240261000000105",
            "description": "Recent weight loss",
            "attributes": null
          },
          {
            "code": "248342006",
            "description": "Underweight",
            "attributes": null
          },
          {
            "code": "249468005",
            "description": "Anorexia symptom",
            "attributes": null
          },
          {
            "code": "249469002",
            "description": "No interest in food",
            "attributes": null
          },
          {
            "code": "249471002",
            "description": "Loss of appetite - symptom",
            "attributes": null
          },
          {
            "code": "267024001",
            "description": "Abnormal weight loss",
            "attributes": null
          },
          {
            "code": "267158006",
            "description": "Weight loss (& abnormal)",
            "attributes": null
          },
          {
            "code": "269813009",
            "description": "Appetite loss - anorexia",
            "attributes": null
          },
          {
            "code": "271816004",
            "description": "Lack of appetite",
            "attributes": null
          },
          {
            "code": "309257005",
            "description": "Excessive weight loss",
            "attributes": null
          },
          {
            "code": "363806002",
            "description": "Weight loss (amount)",
            "attributes": null
          },
          {
            "code": "39161000000101",
            "description": "Decrease in appetite",
            "attributes": null
          },
          {
            "code": "392758003",
            "description": "O/E - Underweight (context-dependent category)",
            "attributes": null
          },
          {
            "code": "401003006",
            "description": "Weight loss from baseline weight",
            "attributes": null
          },
          {
            "code": "405788002",
            "description": "Psychogenic loss of appetite",
            "attributes": null
          },
          {
            "code": "408388001",
            "description": "[D]Underweight",
            "attributes": null
          },
          {
            "code": "413861000000106",
            "description": "[X] Eating disorders: [other] or [pica in adults] or [psychogenic loss of appetite]",
            "attributes": null
          },
          {
            "code": "41421000000102",
            "description": "Decrease in appetite",
            "attributes": null
          },
          {
            "code": "422868009",
            "description": "Unexplained weight loss",
            "attributes": null
          },
          {
            "code": "426977000",
            "description": "Recent weight loss",
            "attributes": null
          },
          {
            "code": "432541000000106",
            "description": "[D]Anorexia NOS",
            "attributes": null
          },
          {
            "code": "448765001",
            "description": "Unintentional weight loss",
            "attributes": null
          },
          {
            "code": "451151000000109",
            "description": "[D]Anorexia NOS",
            "attributes": null
          },
          {
            "code": "46641000000101",
            "description": "Decrease in appetite",
            "attributes": null
          },
          {
            "code": "496871000000107",
            "description": "[D]Anorexia",
            "attributes": null
          },
          {
            "code": "496881000000109",
            "description": "[D]Appetite loss",
            "attributes": null
          },
          {
            "code": "503001000000108",
            "description": "[D]Underweight",
            "attributes": null
          },
          {
            "code": "511461000000103",
            "description": "Unexplained weight loss",
            "attributes": null
          },
          {
            "code": "60861008",
            "description": "Excessive body weight loss",
            "attributes": null
          },
          {
            "code": "64379006",
            "description": "Decrease in appetite",
            "attributes": null
          },
          {
            "code": "699205002",
            "description": "Involuntary weight loss",
            "attributes": null
          },
          {
            "code": "75071000000109",
            "description": "Weight loss from baseline weight",
            "attributes": null
          },
          {
            "code": "768571000000103",
            "description": "Unintentional weight loss",
            "attributes": null
          },
          {
            "code": "768581000000101",
            "description": "Unintentional weight loss",
            "attributes": null
          },
          {
            "code": "78901000000106",
            "description": "Decrease in appetite",
            "attributes": null
          },
          {
            "code": "79311000000104",
            "description": "Weight loss from baseline weight",
            "attributes": null
          },
          {
            "code": "79890006",
            "description": "Loss of appetite",
            "attributes": null
          },
          {
            "code": "816160009",
            "description": "Measured weight loss",
            "attributes": null
          },
          {
            "code": "89362005",
            "description": "Weight loss",
            "attributes": null
          }
        ]
      }
    ],
    "coding_system_release": "",
    "open_codelist_version_id": "7e02386c",
    "open_codelist_version_tag": "",
    "status": 1,
    "doi": "https://doi.org/10.48533/7ryk-cm45",
    "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": 8922,
        "version_name": "Symptoms: weight loss and reduced appetite",
        "version_date": "2026-01-26T23:34:05.589373Z",
        "is_published": true,
        "is_latest": true
      }
    ]
  }
]