Symptoms: fever

PH3760 / 8900

OpenSAFELY

Jan 26, 2026

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OpenCodelists Phenotype

  1. Overview

    Codelist ID
    opensafely/symptoms-fever
    Version ID
    3cd0644e
    Coding System
    SNOMED CT codes
    Collections
    OpenCodelistPhenotype Library
    Tags
    No data

  2. Definition

    This codelist was taken from OpenCodelists, created by OpenSAFELY. We recommend viewing this Phenotype on the OpenCodelist website to view the most recent version.

    Code list aiming to identify individuals consulting complaining of fever.

    © University of Oxford for the Bennett Institute for Applied Data Science 2025. This work may be copied freely for non-commercial research and study.

  3. Methodology

    Identified from intial search terms outside of OpenCodelists: "fever" "pyrexia" "rigor" high temp" "temperature" "hot" febrile"

    Clearly irrelevant codes excluded (with review by a second clinician)

    Candidate codelist uploaded to OpenCodelists for review of candidate codes.

    Specifically excluded hyperpyrexia as likely due to central cause. Included amber and red on NICE traffic light system as they are scoring criteria for feverish children (green excluded as it implies normal).

  4. References

    Source Reference

    https://www.opencodelists.org/codelist/opensafely/symptoms-fever/3cd0644e

  5. Clinical Codelist

  6. API

    To Export Phenotype Details:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3760/version/8900/detail/?format=json
    R Package

    # Download here

    library(ConceptLibraryClient)


    # Connect to API

    client = ConceptLibraryClient::Connection$new(public=TRUE)


    # Get details of Phenotype

    phenotype_details = client$phenotypes$get_detail(
     'PH3760',
     version_id=8900
    )

    Py Package

    # Download here

    from pyconceptlibraryclient import Client


    # Connect to API

    client = Client(public=True)


    # Get details of Phenotype

    phenotype_detail = client.phenotypes.get_detail(
     'PH3760',
     version_id=8900
    )

    To Export Phenotype Code List:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3760/version/8900/export/codes/?format=json
    R Package

    # Download here

    library(ConceptLibraryClient)


    # Connect to API

    client = ConceptLibraryClient::Connection$new(public=TRUE)


    # Get codelist of Phenotype

    phenotype_codelist = client$phenotypes$get_codelist(
     'PH3760',
     version_id=8900
    )

    Py Package

    # Download here

    from pyconceptlibraryclient import Client


    # Connect to API

    client = Client(public=True)


    # Get codelist of Phenotype

    phenotype_codelist = client.phenotypes.get_codelist(
     'PH3760',
     version_id=8900
    )

  7. Version History

    Version IDNameOwnerPublish date
    Symptoms: fever ieuan.scanlon2026-01-26 23:33
    8899 Symptoms: fever ieuan.scanlon2026-01-26 23:33
    8898 Symptoms: fever ieuan.scanlon2026-01-26 23:33