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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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 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 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
Addisons & hypoadrenalism SNOMED CT
Taken from the `ADDIS_COD` fields in SARS-CoV2 (COVID-19) Vaccine Uptake Reporting Codes v.1.5.3
Addisons disease diagnosis codes SNOMED CT
Taken from the `ADDISONS_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/).
Adrenaline Pens dm+d
This list contains dm+d entries for adrenaline auto-injectors, commonly know as pens, which are used by people when they experience an emergency allergic reaction.
Published by OpenSAFELY
Adrenaline auto-injectors BNF
Published by OpenSAFELY
Adult and child psoriasis codes SNOMED CT
Taken from the `PSORIASIS_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/).
Adult and child psoriasis codes (obsolete) SNOMED CT
Taken from the `PSORIASIS_COD` refset published by NHSD.
Advanced decompensated cirrhosis of the liver and associated conditions (ICD-10) ICD-10
Codelist to identify patients with advanced decompensated cirrhosis of the liver.

Decompensated cirrhosis is defined as an acute deterioration in liver function in a patient with cirrhosis and is characterised by jaundice, ascites, hepatic encephalopathy, hepatorenal syndrome or variceal haemorrhage. (Moreau et al, 2013)
Published by OpenSAFELY
Advanced decompensated cirrhosis of the liver and associated conditions (snomed) SNOMED CT
This codelist aims to identify patients with severe liver disease.
Published by OpenSAFELY