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 we have used in OpenSAFELY research to date.

All codelists


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Thiazide type diuretic medication dm+d

The codelist contains medicines that are thiazide diuretics from the "thiazides and related diuretics" section of BNF codes.

Published by OpenSAFELY
Third, fourth, fifth primary COVID vaccination dose SNOMED CT

Taken from the DOSE345_COD fields in SARS-CoV2 (COVID-19) Vaccine Uptake Reporting Codes v.1.5.3

Thyroid Function Tests SNOMED CT

Taken from the TFT_COD field in the National PINCER Data Specification, published by PRIMIS.

© PRIMIS - the University of Nottingham 2021

Published by PINCER
Thyroid function (TSH level) SNOMED CT

...

Published by Ardens
Thyroid function test codes SNOMED CT

Taken from the TFT_COD refset published by NHSD.

Thyroid stimulating hormone (TSH) testing SNOMED CT

This codelist was developed to identify patients receiving a thyroid-stimulating hormone (TSH) test

Published by OpenSAFELY
Thyroid stimulating hormone (TSH) tests (numerical value) SNOMED CT

This codelist was developed to identify patients receiving a thyroid-stimulating hormone (TSH) test, with a numerical value.

Published by OpenSAFELY
Toothpaste BNF

Used by the following OpenPrescribing measures:

Published by OpenPrescribing
Total cholesterol codes SNOMED CT

Taken from the CHOL_COD refset published by NHSD.

Total cholesterol codes with a value SNOMED CT

Taken from the CHOL2_COD refset published by NHSD.

Total cholesterol high-density lipoprotein (HDL) codes SNOMED CT

Taken from the TCHOLHDL_COD refset published by NHSD.

Transient ischaemic attack CTV3

Codes that indicate incident or history of transient ischaemic attack. This codelist include definite and probable transient ischaemic attack. Future studies which require codes denoting definite transient ischaemic attack need to derive another codelist.

Published by OpenSAFELY
Transient ischaemic attack (TIA) codes SNOMED CT

Taken from the TIA_COD refset published by NHSD.

Transient ischaemic attack - secondary care ICD-10

This is a codelist of ICD-10 codes for TIA.

Published by OpenSAFELY
Transplant (SPL-AtRiskv4) (SNOMED CT) SNOMED CT

Taken from the Transplant (SPL-AtRiskv4) tab of the Population Risk COVID-19 Treatments code list v1.3, published by NHS Digital, 2021-12-13.

Published by NHS Digital