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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Generic ciclosporin and tacrolimus BNF
Published by OpenPrescribing
Generic diltiazem BNF
Published by OpenPrescribing
Genetically proven familial hypercholesterolaemia codes SNOMED CT

Taken from the FHYPGEN_COD refset published by NHSD.

Gestational Diabetes SNOMED CT

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

Gestational Diabetes Codes SNOMED CT

Taken from the GESTDIAB_COD refset published by NHSD.

Giant Cell Arteritis CTV3

Codes indicating a diagnosis of Temporal Arteritis or Giant Cell Arteritis

Published by OpenSAFELY
Glucose (all) level SNOMED CT

...

Published by Ardens
Glucose (fasting) level SNOMED CT

...

Published by Ardens
Glucose test exception codes SNOMED CT

Taken from the GLUCEXC_COD refset published by NHSD.

Glucose test recording SNOMED CT

Taken from the GLUC_COD refset published by NHSD.

Glycated haemoglobin (HbA1c) tests SNOMED CT

A SNOMED CT codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests.

Published by OpenSAFELY
Glycated haemoglobin (HbA1c) tests (numerical value) SNOMED CT

A SNOMED CT codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests, which contains a numerical value using the newer IFCC units.

Published by OpenSAFELY
Glycated haemoglobin (HbA1c) tests — IFCC standardised CTV3

A CTV3 codelist for patients receiving monitoring of glycated haemoglobin (HbA1c) tests using reference methods standardised by the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC).

Note that for tests before 2018, test values in the East region appear to be recorded on a different scale (approximately 4 to 8-times greater than mean values in other regions). This issue is being investigated.

Published by OpenSAFELY
Glycopyrronium - Subcutaneous Formulations dm+d

This codelist contains all subcutaneous formulations of glycopyrronium.

Published by OpenSAFELY
Group A Streptococcal sore throat / tonsillitis SNOMED CT

Following an increase in cases of Scarlet Fever and invasive Group A Strep in the UK this codelist aims to identify patients who have had a possible diagnosis of Streptococcal sore throat.

We have taken a pragmatic approach where by codes for sore throat/pharyngitis/tonsilitis have been included where an alternative cause for the sore throat is not stated (eg. Viral sore throat). This codelist will be used in conjunction with codelists for antibiotics recommended for treatment of Group A Strep.

Published by OpenSAFELY