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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Gestational Diabetes Codes SNOMED CT
Taken from the `GESTDIAB_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/).
Giant Cell Arteritis CTV3
Codes indicating a diagnosis of Temporal Arteritis or Giant Cell Arteritis
Published by OpenSAFELY
Giant Cell Arteritis (GCA) codes SNOMED CT
Taken from the `GCA_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/).
Glucocorticoids associated with high risk of osteoporosis dm+d
This codelist aims to identify glucocorticoids that are associated with a high risk of osteoporosis when administered on a long-term basis.
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 codes SNOMED CT
Taken from the `GLUC_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/).
Glucose test recording codes (obsolete) 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
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/).