OpenCodelists

Welcome to OpenCodelists, created by OpenSAFELY for creating and sharing codelists.

Anybody can also use this tool to create and share codelists. To get started, take a look at the documentation or watch the videos.

If you would like to publish codelists on behalf of an organisation, please get in touch.

Below, you'll find all the codelists that have been used in OpenSAFELY research to date.

All codelists


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Unpaid carer codes SNOMED CT
Taken from the `UNPAIDCARER_COD` refset published by NHSD. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Unspecified dementia (ICD10) V1.3 ICD-10
Unspecified dementia (SNOMED-CT) V1.3 SNOMED CT
Upper GI bleeding ICD10 ICD-10
Upper GI bleeding SNOMED SNOMED CT
Upper gastrointestinal bleeding
Upper gastrointestinal (GI) bleed codes SNOMED CT
Taken from the `UPGIBLEED_COD` refset published by NHSD. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Upper respiratory tract infections SNOMED CT
Urea and Electrolytes test results SNOMED CT
Taken from the `UE_COD` refset published by NHSD. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Urinary catheter administration codes for Pharmacy First SNOMED CT
Codes that a GP could use to record that a patient has a Urinary catheter
Urinary-tract infections (antibacterials) dm+d
Urinary-tract infections codelist extracted from antibacterials codelist (https://www.opencodelists.org/codelist/opensafely/antibacterials/27089eaa/)
Published by UKHSA
Urinary-tract-infection-and-related-conditions-for-Pharamcy-First (clone) SNOMED CT
Codes that a GP could use to record that a patient has a urinary tract infection (UTI), or has presented with symptoms or similar/related conditions
Urinary-tract-infection-and-related-conditions-for-Pharmacy-First SNOMED CT
Codes that a GP could use to record that a patient has a urinary tract infection (UTI), or has presented with symptoms that might be attributable to a UTI, or similar/related conditions
Urinary-tract-infection-codes-for-Pharmacy-First (clone) SNOMED CT
Codes that a GP could use to record that a patient has a urinary tract infection (UTI), or has presented UTI symptoms

Codelist updated June 10,2026
Urine albumin codes SNOMED CT
Taken from the `NDAALB_COD` refset published by NHSD. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Urine tests SNOMED CT
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Published by Ardens