Can a notch baby see a doctor and not a physican assistant?

Because this woman happened to be born between 1916 and 1922 she falls into the classification that some call the "notch babies". In actuality there is no such thing. She does not have to be singled out for a certain type of medical care; she is no different than any other elderly person seeking medical treatment. She can see an MD, a DO, a PA or a nurse practioner if she so desires. She simply needs to find one that accepts her Medicare and other insurance if she has any.

I am unclear why the office would distinguish between people born in notch years and any other older Medicare recipient. Benefits should be the same.