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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Methotrexate - injectable dm+d

dm+d codelist for injectable methotrexate

Published by OpenSAFELY
Methotrexate - oral BNF

BNF codelist for oral methotrexate.

Published by OpenSAFELY
Methotrexate 10mg BNF

Used by the following OpenPrescribing measures:

Published by OpenPrescribing
Methotrexate 2.5mg and 10mg BNF

Used by the following OpenPrescribing measures:

Published by OpenPrescribing
Methotrexate Rx dm+d

Taken from the MET_COD field in the National PINCER Data Specification, published by PRIMIS.

© PRIMIS - the University of Nottingham 2021

Published by PINCER
Methylphenidate BNF

pseudoBNF codelist for methylphenidate

Published by OpenSAFELY
Methylphenidate - dmd dm+d

dm+d codelist for methylphenidate

Published by OpenSAFELY
Metronidazole, tinidazole and ornidazole (antibacterials) dm+d

Metronidazole, tinidazole and ornidazole codelist extracted from antibacterials codelist (https://www.opencodelists.org/codelist/opensafely/antibacterials/27089eaa/)

Published by UKHSA
Midazolam BNF

Midazolam that is generally prescribed at the end of life.

Published by OpenSAFELY
Midazolam - end of life dm+d

dm+d codelist for midazolam injections used at the end of life.

Published by OpenSAFELY
Migraine (ICD10) V1.3 ICD-10
Migraine (SNOMED-CT) V1.3 SNOMED CT
Mild Cognitive Impairment codes SNOMED CT

Taken from the MCI_COD refset published by NHSD.

Mild and intermittent asthma diagnosis codes SNOMED CT

Taken from the MILDINTAST_COD refset published by NHSD.

Mild frailty diagnosis codes SNOMED CT

Taken from the MILDFRAIL_COD refset published by NHSD.