COVID-19 Vaccination - Did not attend second appointment

PH3363 / 8376

OpenSAFELY

Jan 26, 2026

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OpenCodelists Phenotype

  1. Overview

    Codelist ID
    opensafely/covid-19-vaccination-did-not-attend-second-appointment
    Version ID
    53e7a91c
    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.

    Codes to identify where someone did not attend a second COVID-19 vaccination appointment also known as DNAs

    © 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

    The codes were identified from the builder and cross referenced with NHS Digital terminology news article. For certain studies you may also be intrested in the OpenSAFELY codelist for not attending the first appointment.

  4. References

    Source Reference

    https://www.opencodelists.org/codelist/opensafely/covid-19-vaccination-did-not-attend-second-appointment/53e7a91c

  5. Clinical Codelist

  6. API

    To Export Phenotype Details:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3363/version/8376/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(
     'PH3363',
     version_id=8376
    )

    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(
     'PH3363',
     version_id=8376
    )

    To Export Phenotype Code List:

    FormatAPI
    JSON site_root/api/v1/phenotypes/PH3363/version/8376/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(
     'PH3363',
     version_id=8376
    )

    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(
     'PH3363',
     version_id=8376
    )

  7. Version History

    Version IDNameOwnerPublish date
    COVID-19 Vaccination - Did not attend second appointment ieuan.scanlon2026-01-26 23:14