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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Disorders with possible learning disability codes SNOMED CT
Taken from the `LDMAY_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/).
Dissent from secondary use of GP patient identifiable data SNOMED CT
Taken from the `POBJEC_COD` refset published by NHSD.
Dissent from secondary use of GP patient identifiable data codes (obsolete) SNOMED CT
Taken from the `POBJEC_COD` refset published by NHSD.
Dissent withdrawn from secondary use of GP patient identifiable data SNOMED CT
Taken from the `POBJECW_COD` refset published by NHSD.
Documented Influenza illness CTV3
Codes indicating a diagnosis of influenza or influenza-like illness
Published by OpenSAFELY
Down syndrome CTV3
Diagnoses of Down syndrome
Published by OpenSAFELY
Down syndrome body mass index (BMI) codes SNOMED CT
Taken from the `BMIDOWNS_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/).
Downs Syndrome (ICD-10) ICD-10
Taken from the Downs Syndrome tab of the Population Risk COVID-19 Treatments code list v1.3, published by NHS Digital, 2021-12-13.
Published by NHS Digital
Downs Syndrome (SNOMED CT) SNOMED CT
Taken from the Downs Syndrome tab of the Population Risk COVID-19 Treatments code list v1.3, published by NHS Digital, 2021-12-13.
Published by NHS Digital
Down’s syndrome codes SNOMED CT
Taken from the `DS_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/).
Down’s syndrome codes (obsolete) SNOMED CT
Taken from the `DS_COD` refset published by NHSD.
Doxycycline (tetracyclines) dm+d
Doxycycline codelist extracted from tetracyclines codelist
Published by UKHSA
Doxycycline medication BNF
Published by OpenSAFELY
Drug treatment for epilepsy dm+d
Taken from the `EPILDRUG_COD` NHS drug refset. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Published by NHS Drug Refsets
Drugs which increase the risk of vitamin D deficiency dm+d
This codelist aims to identify drugs that substantially increase the risk of vitamin D deficiency when administered on a long-term basis.
Published by OpenSAFELY