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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National diabetes audit (NDA) ethnicity codes SNOMED CT
Taken from the `NDAETHNICITY_COD` refset published by NHSD.
National diabetes audit (NDA) pre-diabetes codes SNOMED CT
Taken from the `NDAPRD_COD` refset published by NHSD.
National diabetes audit (NDA) retinal screening codes SNOMED CT
Taken from the `RETSCREN_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/).
National diabetes audit (NDA) smoking habit codes SNOMED CT
Taken from the `NDASMOK_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/).
Nausea - SNOMED SNOMED CT
Nebivolol 2.5mg BNF
Used by the following [OpenPrescribing](https://openprescribing.net) measures:

* [Nebivolol 2.5mg tablets](https://openprescribing.net/measure/nebivolol/)
Published by OpenPrescribing
Nebulised asthma and COPD medications dm+d
A list of nebulised medications preparations at VMP and AMP from the [NHS Dictionary of Medicines and Devices](https://ebmdatalab.net/what-is-the-dmd-the-nhs-dictionary-of-medicines-and-devices/) that are used in asthma and COPD.
Published by OpenSAFELY
Neurological disorders SNOMED CT
Neurological disorders (not including epilepsy) CTV3
New York Heart Association Classification of heart failure codes SNOMED CT
Taken from the `NYHA_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/).
Newer aminosalicylates for IBD BNF
Published by OpenSAFELY
Newer aminosalicylates for IBD - dmd dm+d
dmd codelist for newer aminosalicylates for IBD; balsalazide, mesalazine, olsalazine.
Published by OpenSAFELY
Nimodipine BNF
Used by the following [OpenPrescribing](https://openprescribing.net) measures:

* [Prescribing of nimodipine](https://openprescribing.net/measure/nimodipine/)
Published by OpenPrescribing
Nirmatrelvir drug interactions (consider risks and benefits) BNF
Drugs with a recommendation of 'consider risks and benefits' in the Specialist Pharmacy Services publication on interactions with the drug Nirmatrelvir, published 2022-02-02.
Published by OpenSAFELY
Nitrofurantoin dm+d
Nitrofurantoin