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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Non‐alcoholic steatohepatitis ICD10 ICD-10
Non‐alcoholic steatohepatitis SNOMED SNOMED CT
North and East Devon Formulary - 1st line drugs (green) BNF
Published by NHS Devon
North and East Devon Red Drugs BNF
N&E Devon red drugs list, created by import from NHS Devon files.
Published by NHS Devon
Not stated ethnicity group codes (2016 grouping) SNOMED CT
Taken from the `ETH2016NSTAT_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/).
Not stated ethnicity group codes (2016 grouping) (obsolete) SNOMED CT
Taken from the `ETH2016NSTAT_COD` refset published by NHSD.
Novavax booster medication code dm+d
Taken from the `NXB1RX_COD` field in SARS-CoV2 COVID19 Vaccination Uptake Reporting Codes 20_21, published by PRIMIS.

© PRIMIS - the University of Nottingham 2021
Novavax vaccination medication code dm+d
Taken from the `NXD1/2RX_COD` fields in SARS-CoV2 COVID19 Vaccination Uptake Reporting Codes 20_21, published by PRIMIS.

© PRIMIS - the University of Nottingham 2021
Nursing home residency codes SNOMED CT
Taken from the `RESNURS_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/).
Nutrition and diet assessment codes SNOMED CT
Taken from the `NUTRIASS_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/).
Nutrition and diet assessment declined codes SNOMED CT
Taken from the `NUTRIASSDEC_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/).
Obese (BMI 30+) SNOMED CT
Obesity (ICD10) ICD-10
Obesity as recorded in secondary care data
Published by REDUCEHF
Obstructive sleep apnoea SNOMED CT
This codelist aims to identify adult patients who have obstructive sleep apnoea.
Published by OpenSAFELY
Oedema SNOMED CT
Oedema symptom for diagnosing HF
Published by REDUCEHF