Create A UMLS Account
Some of the terminologies used by OMOP require a UMLS account and API key. To get a UMLS account and API key follow the steps below.
Before you can create a UMLS account you will need an identity provider. I'm using login.gov.
To create a login.gov account follow the instructions
here.
Create Your Account
Submit a request for a UMLS account from
https://uts.nlm.nih.gov/uts/signup-login/
and select "Sign Up".
Once your done filling out the forms you will be told it will take 3 business days for your request to be processed