Glycated haemoglobin (HbA1c) tests

PH3433 / 8472

OpenSAFELY

Jan 26, 2026

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OpenCodelists Phenotype

  1. Overview

    Codelist ID
    opensafely/glycated-haemoglobin-hba1c-tests
    Version ID
    2ab11f20
    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.

    A SNOMED CT codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests.

    © 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

    2 search strategies: 1: Use SNOMED codes for existing CTV3 codes in SRO notebooks (using Kahootz CTV3 browser) 2: Search for "haemoglobin A1c" and selecting any codes which related to total HbA1c monitoring and level, excluding any codes for other purposes, including reference ranges. Both the current IFCC mmol/mol and the previous percentage codes are included.

    Whether codes relating to "monitoring" rather than "level" need to excluded is still to be determined.

  4. References

    Source Reference

    https://www.opencodelists.org/codelist/opensafely/glycated-haemoglobin-hba1c-tests/2ab11f20

  5. Clinical Codelist

  6. API

    To Export Phenotype Details:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3433/version/8472/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(
     'PH3433',
     version_id=8472
    )

    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(
     'PH3433',
     version_id=8472
    )

    To Export Phenotype Code List:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3433/version/8472/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(
     'PH3433',
     version_id=8472
    )

    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(
     'PH3433',
     version_id=8472
    )

  7. Version History

    Version IDNameOwnerPublish date
    Glycated haemoglobin (HbA1c) tests ieuan.scanlon2026-01-26 23:17
    8471 Glycated haemoglobin (HbA1c) tests ieuan.scanlon2026-01-26 23:17