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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Concentration of C-peptide in plasma SNOMED CT

Taken from the CPEPTIDE_COD refset published by NHSD.

2WW referral colorectal SNOMED CT
3-in-1 Diphtheria, tetanus, and polio vaccine administration codes SNOMED CT

Taken from the 3IN1VAC_COD refset published by NHSD.

4-in-1 Diphtheria, tetanus, pertussis and polio vaccine administration codes SNOMED CT

Taken from the 4IN1VAC_COD refset published by NHSD.

5-in-1 Diphtheria, tetanus, pertussis, polio, and Haemophilus influenzae type b vaccine administration codes SNOMED CT

Taken from the 5IN1VAC_COD refset published by NHSD.

6-in-1 Diphtheria, tetanus, pertussis, polio, Haemophilus influenzae type b, and hepatitis B vaccine administration codes SNOMED CT

Taken from the 6IN1VAC_COD refset published by NHSD.

ACE Inhibitor Medications dm+d

The codelist contains medicines that are ACE Inhibitors from the RAS section of BNF codes.

Published by OpenSAFELY
ACE inhibitors BNF
Published by OpenPrescribing
ARBs BNF
Published by OpenPrescribing
Abdominal aortic aneurysm diagnosis codes SNOMED CT

Taken from the AAA_COD refset published by NHSD.

Absence of Appendix CTV3

Codes that indicate an absence of an appendix, either as a clinical finding or due to appendicectomy

Published by OpenSAFELY
Active and inactive ethnicity codes SNOMED CT

Taken from the ETHNALL_COD refset published by NHSD.

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