@Gowtham_Rao runs this resource via the Phenotype WG. There’s some discussion here about its evolution. There is a public ATLAS atlas-phenotype.ohdsi.org that you can get access to. I think @admin has the keys to that car. (I can’t remember where the Google form is. Sorry, Lee!)
Sounds like something for CohortIncidence or its ATLAS siblings. Maybe @Chris_Knoll has some ideas.