I know OHDSI has many tools like Athena, ATLAS, etc for the vocabularies. Is there a tool that can be used to create custom concept ids (greater than 2 billion?
… and then manage them (updating, deprecating, merging, splitting)?
Very good idea, but the answer is no, @Nsingleton1.
@Nsingleton1, it should be rather easy to homebrew up a system using psv files, git and python to do a local instance as you know what you need; it would be considerable harder to do it for every scenario.