A hypothetical medical exam/fitness exam for surgeons would be quite different than ours.

Probably need to focus just on hand/eye coordination and cog.

Vision, hearing would matter little unless you're seriously blind (they use magnifying equipment for fine work any way).

Even risk for sudden incap wouldn't matter much, not like the whole OR is going to crash if the surgeon faints. They can just bring in another one to close it up. If it's something complex there will be more than one anyway.

I'm not sure you need any such exam for office practitioners, many or most specialties have to recertify anyway... if a doc is suffering from dementia, that should be apparent.