[
  {
    "phenotype_id": "PH3759",
    "phenotype_version_id": 8897,
    "name": "Symptoms: fatigue",
    "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 fatigue.\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": "2026-01-26T23:33:10.677397Z",
    "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": "2026-01-26T23:33:12.076918Z",
    "references": [],
    "signed_off": [],
    "methodology": "Identified from intial search terms outside of OpenCodelists: \"fatigue\" \"tired\" \"weary\" weariness\" \"lassitude\" \"asthenia\" weak\" \"energy\" \"sluggish\" \"worn out\" exhaust\" \"me/cfs\" \"myalgic enceph\" \"lethar\" drows\" \" me \" \"me \" \"tatt\" \"m.e.\" \"cfs\" \n\n\nClearly irrelevant codes excluded (with review by a second clinician)\n\n\nCandidate codelist uploaded to OpenCodelists for review of candidate codes.\n\n\nExcluded codes related to drowsiness as this could be related to medication or other causes and does not necessarily imply fatigue.\n\n",
    "coding_system": [
      {
        "name": "SNOMED  CT codes",
        "value": 9
      }
    ],
    "open_codelist_id": "opensafely/symptoms-fatigue",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/symptoms-fatigue/0e9ac677",
    "concept_information": [
      {
        "concept_id": 9074,
        "concept_version_id": 16559,
        "concept_name": "opensafely/symptoms-fatigue/0e9ac677",
        "coding_system": {
          "id": 9,
          "name": "SNOMED  CT codes",
          "description": "SNOMED CT codes"
        },
        "phenotype_id": "PH3759",
        "phenotype_version_id": 8897,
        "phenotype_name": "Symptoms: fatigue",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "10361001",
            "description": "Exhaustion delirium",
            "attributes": null
          },
          {
            "code": "123087006",
            "description": "Sluggishness",
            "attributes": null
          },
          {
            "code": "13791008",
            "description": "Asthenia",
            "attributes": null
          },
          {
            "code": "138414008",
            "description": "M.E.Association member",
            "attributes": null
          },
          {
            "code": "139124002",
            "description": "[Tiredness], [fatigue], [lethargy] or [malaise] symptom",
            "attributes": null
          },
          {
            "code": "139126000",
            "description": "Fatigue",
            "attributes": null
          },
          {
            "code": "139127009",
            "description": "Tired all the time",
            "attributes": null
          },
          {
            "code": "139128004",
            "description": "(Malaise: [/lethargy] or [debility]) or (overwork) or (postviral syndrome)",
            "attributes": null
          },
          {
            "code": "139131003",
            "description": "Tiredness symptom NOS",
            "attributes": null
          },
          {
            "code": "139512001",
            "description": "Weakness present",
            "attributes": null
          },
          {
            "code": "154890009",
            "description": "(Nervous debility - neurasthenia) or (nervous exhaustion) or (TATT - tired all the time)",
            "attributes": null
          },
          {
            "code": "154989001",
            "description": "Postinfective encephalitis (& [myalgic encephalitis] or [myalgic encephalomyelitis])",
            "attributes": null
          },
          {
            "code": "154991009",
            "description": "Encephalitis/myelitis: [NOS] or [encephalomyelitis & (myalgic)]",
            "attributes": null
          },
          {
            "code": "155062000",
            "description": "Chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "157744003",
            "description": "Exhaustion due to exposure",
            "attributes": null
          },
          {
            "code": "157746001",
            "description": "(Effects of the elements NOS) or (overexertion exhaustion)",
            "attributes": null
          },
          {
            "code": "157748000",
            "description": "Exhaustion due to excessive exertion",
            "attributes": null
          },
          {
            "code": "158122000",
            "description": "[D]Drowsiness",
            "attributes": null
          },
          {
            "code": "158167007",
            "description": "[D]Malaise and fatigue",
            "attributes": null
          },
          {
            "code": "158169005",
            "description": "[D]Fatigue",
            "attributes": null
          },
          {
            "code": "158170006",
            "description": "Asthenia [D]",
            "attributes": null
          },
          {
            "code": "158171005",
            "description": "[D]Lethargy",
            "attributes": null
          },
          {
            "code": "158173008",
            "description": "[D]Malaise and fatigue NOS",
            "attributes": null
          },
          {
            "code": "161868006",
            "description": "([Tiredness] or [fatigue] or [lethargy] or [malaise] symptom) or (C/O \"muzzy head\")",
            "attributes": null
          },
          {
            "code": "161870002",
            "description": "Tired all the time (& [C/O -])",
            "attributes": null
          },
          {
            "code": "161871003",
            "description": "(Malaise/lethargy) or (C/O: [debility - malaise] or [overwork] or [postviral syndrome])",
            "attributes": null
          },
          {
            "code": "161875007",
            "description": "Tiredness symptom NOS",
            "attributes": null
          },
          {
            "code": "191741007",
            "description": "(Neurasthenia - nervous debility) or (nervous exhaustion) or",
            "attributes": null
          },
          {
            "code": "192439005",
            "description": "Neurasthenia",
            "attributes": null
          },
          {
            "code": "192735003",
            "description": "Other causes of encephalitis (& [myalgic encephalomyelitis] or [encephalomyelitis NOS])",
            "attributes": null
          },
          {
            "code": "193054000",
            "description": "Chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "206711009",
            "description": "[D]Drowsiness",
            "attributes": null
          },
          {
            "code": "206765009",
            "description": "[D]Malaise and fatigue",
            "attributes": null
          },
          {
            "code": "206767001",
            "description": "[D]Fatigue",
            "attributes": null
          },
          {
            "code": "206768006",
            "description": "[D]Asthenia NOS",
            "attributes": null
          },
          {
            "code": "206769003",
            "description": "[D]Lethargy",
            "attributes": null
          },
          {
            "code": "206771003",
            "description": "[D]Tiredness",
            "attributes": null
          },
          {
            "code": "206773000",
            "description": "[D]Malaise and fatigue NOS",
            "attributes": null
          },
          {
            "code": "214264003",
            "description": "Lethargy",
            "attributes": null
          },
          {
            "code": "224960004",
            "description": "Tired",
            "attributes": null
          },
          {
            "code": "242015007",
            "description": "Exhaustion - physiological",
            "attributes": null
          },
          {
            "code": "247372003",
            "description": "Chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "248268002",
            "description": "Tires quickly",
            "attributes": null
          },
          {
            "code": "248269005",
            "description": "Tired on least exertion",
            "attributes": null
          },
          {
            "code": "248270006",
            "description": "Quickly exhausted",
            "attributes": null
          },
          {
            "code": "248271005",
            "description": "Exhausted on least exertion",
            "attributes": null
          },
          {
            "code": "248274002",
            "description": "Lack of energy",
            "attributes": null
          },
          {
            "code": "248275001",
            "description": "Lack of vitality",
            "attributes": null
          },
          {
            "code": "248278004",
            "description": "Attacks of weakness",
            "attributes": null
          },
          {
            "code": "267031002",
            "description": "Tiredness symptom",
            "attributes": null
          },
          {
            "code": "267032009",
            "description": "Tired all the time",
            "attributes": null
          },
          {
            "code": "267033004",
            "description": "Malaise/lethargy",
            "attributes": null
          },
          {
            "code": "267160008",
            "description": "[Tiredness], [fatigue], [lethargy] or [malaise] symptom",
            "attributes": null
          },
          {
            "code": "267161007",
            "description": "(Malaise: [/lethargy] or [debility]) or (overwork) or (postviral syndrome)",
            "attributes": null
          },
          {
            "code": "267683005",
            "description": "Postinfective encephalitis (& [myalgic encephalitis] or [myalgic encephalomyelitis])",
            "attributes": null
          },
          {
            "code": "267684004",
            "description": "Encephalitis/myelitis: [NOS] or [encephalomyelitis & (myalgic)]",
            "attributes": null
          },
          {
            "code": "268631001",
            "description": "Neurasthenia",
            "attributes": null
          },
          {
            "code": "268754004",
            "description": "(Nervous debility - neurasthenia) or (nervous exhaustion) or (TATT - tired all the time)",
            "attributes": null
          },
          {
            "code": "269429009",
            "description": "(Effects of the elements NOS) or (overexertion exhaustion)",
            "attributes": null
          },
          {
            "code": "271795006",
            "description": "Malaise and fatigue",
            "attributes": null
          },
          {
            "code": "271797003",
            "description": "Lethargy",
            "attributes": null
          },
          {
            "code": "271798008",
            "description": "Chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "272036004",
            "description": "Complaining of debility and malaise",
            "attributes": null
          },
          {
            "code": "272060000",
            "description": "Fatigue - symptom",
            "attributes": null
          },
          {
            "code": "272062008",
            "description": "Complaining of \"tired all the time\"",
            "attributes": null
          },
          {
            "code": "274236006",
            "description": "[D]Asthenia",
            "attributes": null
          },
          {
            "code": "274638001",
            "description": "Asthenia",
            "attributes": null
          },
          {
            "code": "279123003",
            "description": "Exhausting",
            "attributes": null
          },
          {
            "code": "302758002",
            "description": "Tiredness",
            "attributes": null
          },
          {
            "code": "314109004",
            "description": "Feeling tired",
            "attributes": null
          },
          {
            "code": "323341000000102",
            "description": "Anxiety about lethargy",
            "attributes": null
          },
          {
            "code": "366947008",
            "description": "Exhaustion",
            "attributes": null
          },
          {
            "code": "367172001",
            "description": "Exhaustion",
            "attributes": null
          },
          {
            "code": "367392001",
            "description": "Lacking in energy",
            "attributes": null
          },
          {
            "code": "372601000000101",
            "description": "Activity management for chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "377161000000108",
            "description": "Severe chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "377171000000101",
            "description": "Moderate chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "377181000000104",
            "description": "Mild chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "414631000000100",
            "description": "[D]Malaise and fatigue NOS",
            "attributes": null
          },
          {
            "code": "439201000000104",
            "description": "[D]Asthenia NOS",
            "attributes": null
          },
          {
            "code": "442099003",
            "description": "Psychogenic fatigue",
            "attributes": null
          },
          {
            "code": "444042007",
            "description": "Excessive postexertional fatigue",
            "attributes": null
          },
          {
            "code": "46219009",
            "description": "Neurocirculatory asthenia",
            "attributes": null
          },
          {
            "code": "463761000000103",
            "description": "[D]Malaise and fatigue NOS",
            "attributes": null
          },
          {
            "code": "480621000000108",
            "description": "Severe chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "487011000000107",
            "description": "Activity management for chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "490851000000100",
            "description": "Activity management for chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "491281000000101",
            "description": "Mild chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "491291000000104",
            "description": "Moderate chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "495371000000106",
            "description": "[D]Drowsiness",
            "attributes": null
          },
          {
            "code": "495751000000103",
            "description": "[D]Malaise and fatigue",
            "attributes": null
          },
          {
            "code": "495771000000107",
            "description": "[D]Fatigue",
            "attributes": null
          },
          {
            "code": "495781000000109",
            "description": "[D]Lethargy",
            "attributes": null
          },
          {
            "code": "495801000000105",
            "description": "[D]Tiredness",
            "attributes": null
          },
          {
            "code": "502201000000109",
            "description": "[D]Asthenia",
            "attributes": null
          },
          {
            "code": "508581000000104",
            "description": "Post-exertional fatigue",
            "attributes": null
          },
          {
            "code": "51771007",
            "description": "Postviral fatigue syndrome",
            "attributes": null
          },
          {
            "code": "520511000000101",
            "description": "Referral to chronic fatigue syndrome specialist team",
            "attributes": null
          },
          {
            "code": "520521000000107",
            "description": "Referral to chronic fatigue syndrome/myalgic encephalomyelitis specialist team",
            "attributes": null
          },
          {
            "code": "522991000000100",
            "description": "Referral for chronic fatigue syndrome activity management",
            "attributes": null
          },
          {
            "code": "523001000000101",
            "description": "Referral for chronic fatigue syndrome activity management",
            "attributes": null
          },
          {
            "code": "52663000",
            "description": "Lethargy",
            "attributes": null
          },
          {
            "code": "52702003",
            "description": "Chronic fatigue syndrome",
            "attributes": null
          },
          {
            "code": "580521000000101",
            "description": "Tiredness symptom NOS",
            "attributes": null
          },
          {
            "code": "58535001",
            "description": "Physical AND emotional exhaustion state",
            "attributes": null
          },
          {
            "code": "60119000",
            "description": "Exhaustion",
            "attributes": null
          },
          {
            "code": "64113006",
            "description": "Exhaustion due to excessive exertion",
            "attributes": null
          },
          {
            "code": "713121000",
            "description": "Management of fatigue",
            "attributes": null
          },
          {
            "code": "713568000",
            "description": "Occasionally tired",
            "attributes": null
          },
          {
            "code": "84229001",
            "description": "Fatigue",
            "attributes": null
          },
          {
            "code": "84946008",
            "description": "Extreme exhaustion",
            "attributes": null
          },
          {
            "code": "88164008",
            "description": "Exhaustion due to exposure",
            "attributes": null
          }
        ]
      }
    ],
    "coding_system_release": "",
    "open_codelist_version_id": "0e9ac677",
    "open_codelist_version_tag": "",
    "status": 1,
    "doi": "https://doi.org/10.48533/qpqz-ay54",
    "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": 8897,
        "version_name": "Symptoms: fatigue",
        "version_date": "2026-01-26T23:33:12.089602Z",
        "is_published": true,
        "is_latest": true
      },
      {
        "version_id": 8896,
        "version_name": "Symptoms: fatigue",
        "version_date": "2026-01-26T23:33:10.683775Z",
        "is_published": true,
        "is_latest": false
      }
    ]
  }
]