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[bioontology-support] CPT Ontology

John Graybeal jgraybeal at
Wed Sep 23 15:04:17 PDT 2020

I'm sorry, there is no way of getting a copy of the CPT ontology from BioPortal—the license never allowed for that. We do not expect it to become accessible through BioPortal in the near future.

As with several other ontologies, individuals have the ability to download UMLS themselves using their UMLS license [1], and use the umls2rdf conversion software [2] to work with it in their own OntoPortal repository [3] for their own purposes. Of course those users must remain in accordance with the UMLS and CPT licenses. Perhaps this will provide a useful workaround for some individuals.


[1] UMLS access and license:
[2] umls2rdf:
[3] OntoPortal:

On Sep 23, 2020, at 2:04 PM, Dr. Adrian Humberto Lopez <adrianhumberto at<mailto:adrianhumberto at>> wrote:

Hi, im reading this will be removed, is there any way of getting a copie? O will it be available again?

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John Graybeal
Technical Program Manager
Center for Expanded Data Annotation and Retrieval /+/ NCBO BioPortal
Stanford Center for Biomedical Informatics Research
650-736-1632  | ORCID  0000-0001-6875-5360

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