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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Interleukin receptor inhibitors systemic medication codes dm+d
Taken from the `ILDRUG_COD` NHS drug refset. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Published by NHS Drug Refsets
International normalised ratio (INR) CTV3
This codelist is used to identify INR blood tests.
Published by OpenSAFELY
Interpreter required SNOMED CT
This codelist includes any code indicating that an individual requires an interpreter for a non-English language, (codes specifically relating to sign language were excluded).
Published by OpenSAFELY
Interstitial Lung Disease CTV3
These codes indicate a diagnosis of interstitial lung disease (ILD)
Published by OpenSAFELY
Interstitial lung disease (ICD10) ICD-10
ICD-10 codes for interstitial lung disease (ILD)
Interstitial lung disease (pulmonary fibrosis) SNOMED CT
Interstitial lung disease codes SNOMED CT
Taken from the `ILD_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/).
Intestinal obstruction ICD10 ICD-10
Intestinal obstruction SNOMED SNOMED CT
Intranasal seasonal influenza vaccination first dose given by other healthcare provider codes SNOMED CT
Taken from the `INTOHP1_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/).
Intranasal seasonal influenza vaccination second dose given by other healthcare provider codes SNOMED CT
Taken from the `INTOHP2_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/).
Intranasal seasonal influenza vaccine drug codes dm+d
Taken from the `INTGPDRUG_COD` NHS drug refset. Contains public sector information licensed under the UK Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Published by NHS Drug Refsets
Intranasal seasonal influenza vaccine first dose given codes SNOMED CT
Taken from the `INTGP1_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/).
Intranasal seasonal influenza vaccine second dose codes SNOMED CT
Taken from the `INTGP2_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/).
Invasive Group A Strep SNOMED CT
Following an increase in cases of [Scarlet Fever and invasive Group A Strep in the UK](https://ukhsa.blog.gov.uk/2022/12/05/group-a-strep-what-you-need-to-know/) this codelist aims to identify patients who have had a diagnosis of or a suspected diagnosis of Invasive Group A Strep including sepsis, necrotizing fasciitis and streptococcal toxic shock syndrome caused by Group A Strep.
Published by OpenSAFELY