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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Dissent withdrawn from secondary use of GP patient identifiable data SNOMED CT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.

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.

Down’s syndrome codes 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
Dry powder inhaler not indicated codes SNOMED CT

Taken from the DRYPWDINHNI_COD refset published by NHSD.

Dual energy X-ray absorptiometry (DXA) scan result of osteoporotic without a value SNOMED CT

Taken from the DXA_COD refset published by NHSD.

Dual energy X-ray absorptiometry (DXA) scan result of osteoporotic without a value codes SNOMED CT

Taken from the DXA_COD refset published by NHSD.

Dual energy X-ray absorptiometry (DXA) scan result with a T score value SNOMED CT

Taken from the DXA2_COD refset published by NHSD.

Dual energy X-ray absorptiometry (DXA) scan result with a T score value codes SNOMED CT

Taken from the DXA2_COD refset published by NHSD.