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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ACE Inhibitor Medications dm+d

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

Published by OpenSAFELY
Absence of Appendix CTV3

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

Published by OpenSAFELY
Acute Appendicitis CTV3

Codes that indicate an episode of acute appendicitis

Published by OpenSAFELY
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
Addisons & hypoadrenalism SNOMED CT

Taken from the ADDIS_COD fields in SARS-CoV2 (COVID-19) Vaccine Uptake Reporting Codes v.1.5.3

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
Alanine aminotransferase (ALT) tests SNOMED CT

This codelist was developed to identify patients receiving a alanine transferaminase test, as an indicator of a liver function test.

Published by OpenSAFELY
Alanine aminotransferase (ALT) tests (numerical value) SNOMED CT

This codelist was developed to identify patients receiving a alanine tranfseraminase test, as an indicator of a liver function test, where a numerical value is recorded.

Published by OpenSAFELY
Alfentanil subcutaneous dm+d dm+d

This code list contains alfentanil formulations which may be given subcutaneously.

Published by OpenSAFELY
All BMI coded terms SNOMED CT

Taken from the BMI_STAGE field in SARS-CoV2 COVID19 Vaccination Uptake Reporting Codes 20_21 v1.2, published by PRIMIS.

© PRIMIS - the University of Nottingham 2021

Alpha-Adrenoceptor Blocking Drugs dm+d

This code list contains NHS dm+d codes for alpha-adrenoceptor blocking Drugs in the cardiovascular chapter of BNF codes.

Published by OpenSAFELY
Amputation CTV3

Codelist for defining the presence of a history of amputation

Published by OpenSAFELY
Amputation OPCS-4 procedure codes OPCS-4

OPCS-4 codes to identify amputations following orthopaedic surgery

Published by OpenSAFELY
Amputation of lower limb CTV3

This captures amputation of the lower limb for the risk prediction project. Other studies requiring amputation codes should refer to the full codelist, under 'Amputation'.

Published by OpenSAFELY