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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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
Graft versus host disease (GVHD) codes SNOMED CT
Taken from the `GVHD_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/).
Grave’s disease codes SNOMED CT
Taken from the `GRAVESDIS_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/).
Group A Streptococcal sore throat / tonsillitis SNOMED CT
Following an increase in cases of [Scarlet Fever and invasive Group A Strep in the UK](https://ukhsa.blog.gov.uk/2022/12/05/group-a-strep-what-you-need-to-know/) 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 conjun…
Published by OpenSAFELY
Guanfacine - dmd dm+d
dm+d codelist for guanfacine
Published by OpenSAFELY
Guillain Barre CTV3
CTV3 codelist for Guillain Barre syndrome

To be used in conjunction with ICD-10 code G61.0 'Guillain Barre syndrome'
Published by OpenSAFELY
Guillain Barre syndrome - ICD10 ICD-10
Guillain-Barre syndrome ICD-10 codelist for use with hospital admissions and mortality data
Published by OpenSAFELY
H pylori infection-ICD10 ICD-10
H pylori infection-SNOMED SNOMED CT
HASBLED score codes SNOMED CT
Taken from the `HASBLED_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/).
HDL Cholesterol SNOMED CT
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Published by Ardens
HDL cholesterol SNOMED CT
HIV CTV3
Codes indicating a diagnosis of HIV
Published by OpenSAFELY
HIV (SNOMED) SNOMED CT
Automatically-generated equivalent of [HIV](/codelist/opensafely/hiv/)
Published by OpenSAFELY