AMA stands for American Medical Association. It is a well-known site, but not to recruiters it appears, as few search it. Unlike most sites where you need to xray to find what you want this site, is ready built, and all you need to do as you see below is not over think it.

https://doctorfinder.ama-assn.org/doctorfinder/extendedSpecialty.do

As you can see it is a simple search. If you fill out the search criteria correctly you get the below:

If you go into each Doctor you will get where they work, were they went to school, their discipline and more.  This is more than enough if you have seen my Youtube Videos on being a detective to find contact info and more.

Until next week, may the source be with you!