If your Dr. is unsure, you might want to find one who is more knowledgeable about it. I'm not positive, but isn't the Dr. the one who has to write a report up, to meet the requirements for you to be qualified. If so, and he doesn't write the report up to meet the requirements, due to being uninformed, your basically rear ended. Just my thoughts, on what I "think" I know. Reads like your doing what you need to do by attempting to collect as much information as needed before proceeding.
God Bless,
David B.