[
  {
    "phenotype_id": "PH3760",
    "phenotype_version_id": 8900,
    "name": "Symptoms: fever",
    "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 fever.\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": "2026-01-26T23:33:14.067165Z",
    "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": "2026-01-26T23:33:17.497758Z",
    "references": [],
    "signed_off": [],
    "methodology": "Identified from intial search terms outside of OpenCodelists: \"fever\" \"pyrexia\" \"rigor\" high temp\" \"temperature\" \"hot\" febrile\" \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\nSpecifically excluded hyperpyrexia as likely due to central cause.\nIncluded amber and red on NICE traffic light system as they are scoring criteria for feverish children (green excluded as it implies normal).\n\n",
    "coding_system": [
      {
        "name": "SNOMED  CT codes",
        "value": 9
      }
    ],
    "open_codelist_id": "opensafely/symptoms-fever",
    "source_reference": "https://www.opencodelists.org/codelist/opensafely/symptoms-fever/3cd0644e",
    "concept_information": [
      {
        "concept_id": 9077,
        "concept_version_id": 16562,
        "concept_name": "opensafely/symptoms-fever/3cd0644e",
        "coding_system": {
          "id": 9,
          "name": "SNOMED  CT codes",
          "description": "SNOMED CT codes"
        },
        "phenotype_id": "PH3760",
        "phenotype_version_id": 8900,
        "phenotype_name": "Symptoms: fever",
        "code_attribute_header": [],
        "codes": [
          {
            "code": "10151000132103",
            "description": "Fever caused by virus",
            "attributes": null
          },
          {
            "code": "102496004",
            "description": "Spiking fever",
            "attributes": null
          },
          {
            "code": "102599008",
            "description": "Warm skin",
            "attributes": null
          },
          {
            "code": "103001002",
            "description": "Feeling feverish",
            "attributes": null
          },
          {
            "code": "1087591000000100",
            "description": "Fever in last 24 hours, Purulence, Attend rapidly under 3 days, Inflamed tonsils, No cough and/or coryza Clinical Score",
            "attributes": null
          },
          {
            "code": "1087601000000106",
            "description": "Assessment using Fever in last 24 hours, Purulence, Attend rapidly under 3 days, Inflamed tonsils, No cough and/or coryza Clinical Score",
            "attributes": null
          },
          {
            "code": "1087611000000108",
            "description": "Fever in last 24 hours, Purulence, Attend rapidly under 3 days, Inflamed tonsils, No cough and/or coryza Clinical Score",
            "attributes": null
          },
          {
            "code": "1104371000000107",
            "description": "Royal College of Physicians National Early Warning Score 2 - temperature score",
            "attributes": null
          },
          {
            "code": "119751000146104",
            "description": "Fever caused by severe acute respiratory syndrome coronavirus 2",
            "attributes": null
          },
          {
            "code": "135882008",
            "description": "Feverish cold",
            "attributes": null
          },
          {
            "code": "135883003",
            "description": "Cough with fever",
            "attributes": null
          },
          {
            "code": "139106004",
            "description": "Temperature symptoms",
            "attributes": null
          },
          {
            "code": "139108003",
            "description": "Feels hot/feverish",
            "attributes": null
          },
          {
            "code": "139109006",
            "description": "Fever with sweating",
            "attributes": null
          },
          {
            "code": "139110001",
            "description": "Rigors: [having] or [symptom]",
            "attributes": null
          },
          {
            "code": "139112009",
            "description": "Temperature symptom NOS",
            "attributes": null
          },
          {
            "code": "140804007",
            "description": "Febrile convulsion (& O/E)",
            "attributes": null
          },
          {
            "code": "141478007",
            "description": "Fever: [examination of] or [O/E]",
            "attributes": null
          },
          {
            "code": "141479004",
            "description": "O/E - fever - general",
            "attributes": null
          },
          {
            "code": "141481002",
            "description": "O/E - fever examination - NAD",
            "attributes": null
          },
          {
            "code": "141482009",
            "description": "O/E -pyrexia of unknown origin",
            "attributes": null
          },
          {
            "code": "141483004",
            "description": "O/E - fever - general NOS",
            "attributes": null
          },
          {
            "code": "141484005",
            "description": "O/E - method temperature taken (& [fever])",
            "attributes": null
          },
          {
            "code": "141489000",
            "description": "O/E - core temperature",
            "attributes": null
          },
          {
            "code": "141493006",
            "description": "O/E - level of fever",
            "attributes": null
          },
          {
            "code": "141497007",
            "description": "O/E - temperature elevated",
            "attributes": null
          },
          {
            "code": "141499005",
            "description": "O/E - level of fever NOS",
            "attributes": null
          },
          {
            "code": "141500001",
            "description": "O/E - character of fever",
            "attributes": null
          },
          {
            "code": "141502009",
            "description": "O/E - fever - acute rise",
            "attributes": null
          },
          {
            "code": "141503004",
            "description": "O/E - fever - gradual rise",
            "attributes": null
          },
          {
            "code": "141504005",
            "description": "O/E - fever - continuous",
            "attributes": null
          },
          {
            "code": "141505006",
            "description": "O/E - fever - remittent",
            "attributes": null
          },
          {
            "code": "141506007",
            "description": "O/E - fever - intermittent",
            "attributes": null
          },
          {
            "code": "141507003",
            "description": "O/E - staircase fever",
            "attributes": null
          },
          {
            "code": "141508008",
            "description": "O/E - fever - irregular",
            "attributes": null
          },
          {
            "code": "141509000",
            "description": "O/E - fever - fast fall-crisis",
            "attributes": null
          },
          {
            "code": "141510005",
            "description": "O/E - fever-gradual fall-lysis",
            "attributes": null
          },
          {
            "code": "141511009",
            "description": "O/E - fever character NOS",
            "attributes": null
          },
          {
            "code": "141512002",
            "description": "O/E - fever NOS",
            "attributes": null
          },
          {
            "code": "158139003",
            "description": "[D]Convulsions, febrile",
            "attributes": null
          },
          {
            "code": "158161008",
            "description": "Pyrexia [D]",
            "attributes": null
          },
          {
            "code": "158162001",
            "description": "[D]Pyrexia of unknown origin",
            "attributes": null
          },
          {
            "code": "158163006",
            "description": "[D]Chills with fever",
            "attributes": null
          },
          {
            "code": "158166003",
            "description": "[D]Fever NEC",
            "attributes": null
          },
          {
            "code": "161850008",
            "description": "[Temperature] or [fever] or [pyrexia] symptoms",
            "attributes": null
          },
          {
            "code": "161852000",
            "description": "Feels hot/feverish",
            "attributes": null
          },
          {
            "code": "161853005",
            "description": "Fever with sweating",
            "attributes": null
          },
          {
            "code": "161854004",
            "description": "Rigors: [having] or [symptom]",
            "attributes": null
          },
          {
            "code": "161855003",
            "description": "Complaining of shivering",
            "attributes": null
          },
          {
            "code": "161856002",
            "description": "Temperature symptom NOS",
            "attributes": null
          },
          {
            "code": "163595003",
            "description": "On examination - febrile convulsion",
            "attributes": null
          },
          {
            "code": "164284002",
            "description": "Fever: [examination of] or [O/E]",
            "attributes": null
          },
          {
            "code": "164285001",
            "description": "On examination - fever - general",
            "attributes": null
          },
          {
            "code": "164288004",
            "description": "On examination - pyrexia of unknown origin",
            "attributes": null
          },
          {
            "code": "164289007",
            "description": "On examination - fever - general NOS",
            "attributes": null
          },
          {
            "code": "164299002",
            "description": "On examination - level of fever",
            "attributes": null
          },
          {
            "code": "164303007",
            "description": "On examination - temperature elevated",
            "attributes": null
          },
          {
            "code": "164304001",
            "description": "On examination - hyperpyrexia - greater than 40.5 degrees Celsius",
            "attributes": null
          },
          {
            "code": "164305000",
            "description": "On examination - level of fever NOS",
            "attributes": null
          },
          {
            "code": "164306004",
            "description": "On examination - character of fever",
            "attributes": null
          },
          {
            "code": "164307008",
            "description": "On examination - fever - acute rise",
            "attributes": null
          },
          {
            "code": "164308003",
            "description": "On examination - fever - gradual rise",
            "attributes": null
          },
          {
            "code": "164309006",
            "description": "On examination - fever - continuous",
            "attributes": null
          },
          {
            "code": "164311002",
            "description": "On examination - fever - remittent",
            "attributes": null
          },
          {
            "code": "164312009",
            "description": "On examination - fever - intermittent",
            "attributes": null
          },
          {
            "code": "164313004",
            "description": "On examination - staircase fever",
            "attributes": null
          },
          {
            "code": "164314005",
            "description": "On examination - fever - irregular",
            "attributes": null
          },
          {
            "code": "164315006",
            "description": "On examination - fever - fast fall-crisis",
            "attributes": null
          },
          {
            "code": "164316007",
            "description": "On examination - fever-gradual fall-lysis",
            "attributes": null
          },
          {
            "code": "164317003",
            "description": "On examination - fever character NOS",
            "attributes": null
          },
          {
            "code": "164318008",
            "description": "On examination - fever NOS",
            "attributes": null
          },
          {
            "code": "17038008",
            "description": "Increased skin temperature",
            "attributes": null
          },
          {
            "code": "186694006",
            "description": "Sweating fever",
            "attributes": null
          },
          {
            "code": "186820006",
            "description": "Relapsing fever",
            "attributes": null
          },
          {
            "code": "186822003",
            "description": "Relapsing fever NOS",
            "attributes": null
          },
          {
            "code": "187374004",
            "description": "[X]Relapsing fever, unspecified",
            "attributes": null
          },
          {
            "code": "206733006",
            "description": "[D]Convulsions, febrile",
            "attributes": null
          },
          {
            "code": "206758001",
            "description": "[D]Pyrexia of unknown origin",
            "attributes": null
          },
          {
            "code": "206760004",
            "description": "[D]Chills with fever",
            "attributes": null
          },
          {
            "code": "206762007",
            "description": "[D]Fever NOS",
            "attributes": null
          },
          {
            "code": "206763002",
            "description": "[D]Persistent fever",
            "attributes": null
          },
          {
            "code": "206764008",
            "description": "[D]Pyrexia of unknown origin NOS",
            "attributes": null
          },
          {
            "code": "218051000000105",
            "description": "Febrile convulsion",
            "attributes": null
          },
          {
            "code": "218061000000108",
            "description": "Febrile convulsion",
            "attributes": null
          },
          {
            "code": "224962007",
            "description": "Hot sweats",
            "attributes": null
          },
          {
            "code": "244491000000108",
            "description": "Pain provoked by temperature",
            "attributes": null
          },
          {
            "code": "247739000",
            "description": "Hallucinations of temperature",
            "attributes": null
          },
          {
            "code": "248424002",
            "description": "Hot and sweaty",
            "attributes": null
          },
          {
            "code": "248425001",
            "description": "Pyrexia",
            "attributes": null
          },
          {
            "code": "248426000",
            "description": "Pyrexia symptoms",
            "attributes": null
          },
          {
            "code": "248427009",
            "description": "Fever symptoms",
            "attributes": null
          },
          {
            "code": "248430002",
            "description": "Pattern of fever",
            "attributes": null
          },
          {
            "code": "248431003",
            "description": "Phase of fever",
            "attributes": null
          },
          {
            "code": "248432005",
            "description": "Rising phase of fever",
            "attributes": null
          },
          {
            "code": "248433000",
            "description": "Plateau phase of fever",
            "attributes": null
          },
          {
            "code": "248434006",
            "description": "Falling phase of fever",
            "attributes": null
          },
          {
            "code": "248435007",
            "description": "Prolonged fever",
            "attributes": null
          },
          {
            "code": "248436008",
            "description": "Slightly remittent fever",
            "attributes": null
          },
          {
            "code": "248444008",
            "description": "Biphasic fever",
            "attributes": null
          },
          {
            "code": "248445009",
            "description": "Fever, diurnal variation",
            "attributes": null
          },
          {
            "code": "248446005",
            "description": "Reversed diurnal fever",
            "attributes": null
          },
          {
            "code": "248447001",
            "description": "Fever defervescence",
            "attributes": null
          },
          {
            "code": "248449003",
            "description": "Central fever",
            "attributes": null
          },
          {
            "code": "248456009",
            "description": "Shivering or rigors",
            "attributes": null
          },
          {
            "code": "248457000",
            "description": "Rigor - symptom",
            "attributes": null
          },
          {
            "code": "267027008",
            "description": "Having rigors",
            "attributes": null
          },
          {
            "code": "268893004",
            "description": "[D]Fever NEC",
            "attributes": null
          },
          {
            "code": "268984004",
            "description": "Examination of fever",
            "attributes": null
          },
          {
            "code": "269033007",
            "description": "Febrile convulsion (& O/E)",
            "attributes": null
          },
          {
            "code": "269049009",
            "description": "O/E - method temperature taken (& [fever])",
            "attributes": null
          },
          {
            "code": "271749004",
            "description": "Acute rise of fever",
            "attributes": null
          },
          {
            "code": "271750004",
            "description": "Gradual rise of fever",
            "attributes": null
          },
          {
            "code": "271751000",
            "description": "Continuous fever",
            "attributes": null
          },
          {
            "code": "271752007",
            "description": "Staircase fever",
            "attributes": null
          },
          {
            "code": "271753002",
            "description": "Irregular fever",
            "attributes": null
          },
          {
            "code": "271754008",
            "description": "Rapid fall of fever",
            "attributes": null
          },
          {
            "code": "271755009",
            "description": "Gradual fall of fever",
            "attributes": null
          },
          {
            "code": "271897009",
            "description": "On examination - fever",
            "attributes": null
          },
          {
            "code": "274234009",
            "description": "[D]Pyrexia",
            "attributes": null
          },
          {
            "code": "274308003",
            "description": "On examination - hyperpyrexia",
            "attributes": null
          },
          {
            "code": "274640006",
            "description": "Fever with chills",
            "attributes": null
          },
          {
            "code": "304213008",
            "description": "Low grade pyrexia",
            "attributes": null
          },
          {
            "code": "307200007",
            "description": "Recurrent febrile convulsion",
            "attributes": null
          },
          {
            "code": "307631000000100",
            "description": "Amber traffic light - intermediate risk of serious illness (Feverish illness in children 2007)",
            "attributes": null
          },
          {
            "code": "307641000000109",
            "description": "Amber traffic light - intermediate risk of serious illness (Feverish illness in children 2007)",
            "attributes": null
          },
          {
            "code": "307651000000107",
            "description": "Amber traffic light - intermediate risk of serious illness (Feverish illness in children 2007)",
            "attributes": null
          },
          {
            "code": "307661000000105",
            "description": "Red traffic light - high risk of serious illness (Feverish illness in children 2007)",
            "attributes": null
          },
          {
            "code": "307671000000103",
            "description": "Red traffic light - high risk of serious illness (Feverish illness in children 2007)",
            "attributes": null
          },
          {
            "code": "307681000000101",
            "description": "Red traffic light - high risk of serious illness (Feverish illness in children 2007)",
            "attributes": null
          },
          {
            "code": "323091004",
            "description": "Febrile convulsions",
            "attributes": null
          },
          {
            "code": "365977007",
            "description": "Finding of pattern of fever",
            "attributes": null
          },
          {
            "code": "365989009",
            "description": "Finding of phase of fever",
            "attributes": null
          },
          {
            "code": "366946004",
            "description": "Feverish cold",
            "attributes": null
          },
          {
            "code": "366956000",
            "description": "Cough with fever",
            "attributes": null
          },
          {
            "code": "367171008",
            "description": "Feverish cold",
            "attributes": null
          },
          {
            "code": "367181007",
            "description": "Cough with fever",
            "attributes": null
          },
          {
            "code": "367493005",
            "description": "Increased body temperature",
            "attributes": null
          },
          {
            "code": "373904004",
            "description": "Feels hot/feverish",
            "attributes": null
          },
          {
            "code": "373906002",
            "description": "Fever with sweating",
            "attributes": null
          },
          {
            "code": "373932008",
            "description": "Feels hot",
            "attributes": null
          },
          {
            "code": "373939004",
            "description": "Feels hot and sweaty",
            "attributes": null
          },
          {
            "code": "37942002",
            "description": "Feels hot",
            "attributes": null
          },
          {
            "code": "386305005",
            "description": "Treatment of fever",
            "attributes": null
          },
          {
            "code": "386661006",
            "description": "Fever",
            "attributes": null
          },
          {
            "code": "38880002",
            "description": "Rigor",
            "attributes": null
          },
          {
            "code": "396991000000105",
            "description": "[D]Fever NOS",
            "attributes": null
          },
          {
            "code": "41497008",
            "description": "Febrile convulsion",
            "attributes": null
          },
          {
            "code": "416113008",
            "description": "Febrile disorder",
            "attributes": null
          },
          {
            "code": "420079008",
            "description": "Relapsing fever",
            "attributes": null
          },
          {
            "code": "42136008",
            "description": "Swinging fever",
            "attributes": null
          },
          {
            "code": "426000000",
            "description": "Fever greater than 100.4 Fahrenheit",
            "attributes": null
          },
          {
            "code": "432354000",
            "description": "Simple febrile seizure",
            "attributes": null
          },
          {
            "code": "433083002",
            "description": "Complex febrile seizure",
            "attributes": null
          },
          {
            "code": "43724002",
            "description": "Chill",
            "attributes": null
          },
          {
            "code": "441761000000105",
            "description": "[X]Relapsing fever, unspecified",
            "attributes": null
          },
          {
            "code": "450361000000103",
            "description": "[D]Pyrexia of unknown origin NOS",
            "attributes": null
          },
          {
            "code": "46107006",
            "description": "Relapsing fever",
            "attributes": null
          },
          {
            "code": "465301000000100",
            "description": "[D]Fever NEC",
            "attributes": null
          },
          {
            "code": "468191000000103",
            "description": "[D]Fever NEC",
            "attributes": null
          },
          {
            "code": "495541000000105",
            "description": "[D]Convulsions, febrile",
            "attributes": null
          },
          {
            "code": "495721000000108",
            "description": "[D]Pyrexia of unknown origin",
            "attributes": null
          },
          {
            "code": "495731000000105",
            "description": "[D]Chills with fever",
            "attributes": null
          },
          {
            "code": "495741000000101",
            "description": "[D]Persistent fever",
            "attributes": null
          },
          {
            "code": "50177009",
            "description": "Body temperature above reference range",
            "attributes": null
          },
          {
            "code": "502181000000105",
            "description": "[D]Pyrexia",
            "attributes": null
          },
          {
            "code": "571041000000100",
            "description": "On examination - fever - general NOS",
            "attributes": null
          },
          {
            "code": "571051000000102",
            "description": "On examination - level of fever NOS",
            "attributes": null
          },
          {
            "code": "582151000000103",
            "description": "On examination - fever NOS",
            "attributes": null
          },
          {
            "code": "582631000000104",
            "description": "Temperature symptom NOS",
            "attributes": null
          },
          {
            "code": "593251000000102",
            "description": "Relapsing fever NOS",
            "attributes": null
          },
          {
            "code": "598631000000100",
            "description": "On examination - fever character NOS",
            "attributes": null
          },
          {
            "code": "62166005",
            "description": "Hysterical fever",
            "attributes": null
          },
          {
            "code": "63993003",
            "description": "Remittent fever",
            "attributes": null
          },
          {
            "code": "64882008",
            "description": "Increased body temperature",
            "attributes": null
          },
          {
            "code": "704425001",
            "description": "Chronic fever",
            "attributes": null
          },
          {
            "code": "707793005",
            "description": "Hot skin",
            "attributes": null
          },
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            "code": "722892007",
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