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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Multiple Sclerosis (SNOMED CT) SNOMED CT
Taken from the Multiple Sclerosis tab of the Population Risk COVID-19 Treatments code list v1.3, published by NHS Digital, 2021-12-13.
Published by NHS Digital
Multiple sclerosis (ICD10) V1.3 ICD-10
Multiple sclerosis (SNOMED-CT) V1.3 SNOMED CT
Multiple sclerosis codes SNOMED CT
Taken from the `MS_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/).
Multiple sclerosis v2 CTV3
Codelist for multiple sclerosis including Y codes not mapped previously, Balo disease, Schilder's disease
Also includes clinically isolated syndrome and optic neuromyelitis
Published by OpenSAFELY
Musculoskeletal disorders CTV3
Myasthenia Gravis (ICD-10) ICD-10
Taken from the Myasthenia Gravis tab of the Population Risk COVID-19 Treatments code list v1.3, published by NHS Digital, 2021-12-13.
Published by NHS Digital
Myasthenia Gravis (SNOMED CT) SNOMED CT
Taken from the Myasthenia Gravis tab of the Population Risk COVID-19 Treatments code list v1.3, published by NHS Digital, 2021-12-13.
Published by NHS Digital
Myasthenia gravis codes SNOMED CT
Taken from the `MYASGRAV_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/).
Mycophenolate dm+d
dm+d codelist for mycophenolate
Published by OpenSAFELY
Mycophenolate (BNF) BNF
BNF codelist for mycophenolate.
Published by OpenSAFELY
Mycophenolate mofetil and mycophenolic sodium systemic medication codes dm+d
Taken from the `MYCOPHENOLATEDRUG_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
Myelodysplastic syndrome (MDS) codes SNOMED CT
Taken from the `MDS_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/).
Myocardial infarction CTV3
This is a list of codes denoting a heart attack / myocardial infarction.
Published by OpenSAFELY
Myocardial infarction (MI) diagnosis codes SNOMED CT
Taken from the `MI_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/).