# Has anyone mapped EMBL-EBI Experimental Factor Ontology (EFO) or EMBL-EBI ChEMBL to MedDRA? **URL:** \ **Category:** General\ **Tags:** ot-platform\ **Created:** [5 April 2023 22:22 UTC](https://community.opentargets.org/t/has-anyone-mapped-embl-ebi-experimental-factor-ontology-efo-or-embl-ebi-chembl-to-meddra/1040 "2023-04-05T22:22:32Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![margaret.mcgee](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@margaret.mcgee](https://community.opentargets.org/u/margaret.mcgee)\ **Post date:** [5 April 2023 22:22 UTC](https://community.opentargets.org/t/has-anyone-mapped-embl-ebi-experimental-factor-ontology-efo-or-embl-ebi-chembl-to-meddra/1040/1 "2023-04-05T22:22:32Z")
Hi, I am curious if anyone here has mapped EMBL-EBI [Experimental Factor Ontology]to or EMBL-EBI [ChEMBL](https://www.ebi.ac.uk/chembl/) MedDRA? Reviewing Drugs.indication, they contain the NCT ID, but not the meddra code. I know NCT ID can be mapped to meddra, but curious how others may have approached mapping disease and or indication to MedDRA and why. Thanks, Maggie ---
**Author:** ![hcornu](https://dub1.discourse-cdn.com/flex017/user_avatar/community.opentargets.org/hcornu/32/716_2.png) [@hcornu](https://community.opentargets.org/u/hcornu)\ **Post date:** [6 April 2023 09:36 UTC](https://community.opentargets.org/t/has-anyone-mapped-embl-ebi-experimental-factor-ontology-efo-or-embl-ebi-chembl-to-meddra/1040/2 "2023-04-06T09:36:34Z")
Hi @margaret.mcgee! There is some ongoing work in this space, I believe. Our team generated a list of approximately 10,000 MedDRA to EFO mappings that we believe have a very high level of confidence. See this ticket for more information: [MedDRA to EFO cross-references · Issue #1088 · EBISPOT/efo · GitHub](https://github.com/EBISPOT/efo/issues/1088)