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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Abdominal distension ICD10 ICD-10
Abdominal pain/discomfort - ICD10 ICD-10
Absence of Appendix CTV3
Codes that indicate an absence of an appendix, either as a clinical finding or due to appendicectomy
Published by OpenSAFELY
Aciclovir dm+d
Aciclovir
Acquired immune deficiency syndrome (AIDS) codes SNOMED CT
Taken from the `AIDS_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/).
Active and inactive ethnicity codes SNOMED CT
Taken from the `ETHNALL_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/).
Acute Appendicitis CTV3
Codes that indicate an episode of acute appendicitis
Published by OpenSAFELY
Acute Pancreatitis ICD10 ICD-10
This codelist contains ICD10 Codes for Acute Pancreatitis.
Acute Pancreatitis SNOMED SNOMED CT
Snomed Codes for Acute Pancreatitis
Acute Respiratory Illness (Primary Care) SNOMED CT
A collection of non-specific codes relating to acute respiratory illnesses (ARI) not including pathogen specific codes. To be used in conjunction with WHO definition of Influenza-like-illness. To be used to detect influenza cases with more sensitivity, rather than specificity.
Published by OpenSAFELY
Acute Respiratory Illness (Secondary Care) ICD-10
A collection of non-specific codes relating to acute respiratory illnesses (ARI) not including pathogen specific codes. Adapted from WHO definition of Influenza-like-illness, whereas with the primary care ARI codelist (see references) fever and cough can be used to build a build a full ILI profile, in secondary care this is more difficult so just the ARI codelist is used. To be used to detect influenza cases with more sensitivity, rather than specificity.
Published by OpenSAFELY
Acute bronchitis as Acute Sore Throat Control SNOMED CT
Acute bronchitis
Acute confusion codes SNOMED CT
Taken from the `ACCONFUS_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/).
Acute transverse myelitis ICD-10 ICD-10
Acute transverse myelitis ICD-10 codelist for use with hospital and mortality data

Codelist aims to be specific rather than sensitive, and to describe acute transverse myelitis occuring on its own rather than myelitis as part of a broader disease process such as encephalomyelitis or ADEM. Does not include codes which are not specific to acute transverse myelitis, e.g. such as 'Encephalitis, myelitis and encephalomyelitis'.
Published by OpenSAFELY
Addictive medicines dm+d
Codelist for addictive medicines. Including Z-drugs, benzodiazepines, gabapentinoids
Published by OpenSAFELY