A good example is Johns Hopkins, affiliated with the JH Medical school.
Cornell-Weill is the same situation. The Jack Miller Center specifically treats patients with neuropathies.

A good teaching hospital doesn't let students take over your case.
It allows students to examine you, under the supervision of an experienced doc. That doc is the one who treats, diagnoses
and prescribes for you.
There is the search - finding the right experienced doctor/neurologist.
(BTW-An intern is a licensed doctor, just starting his career- there is a difference between an intern and students)

If you insist on a specialist, a doc with PN expertise, at a large hospital with a large neuro dept - it will most probably (not certainly, but possibly) have one PN specialist.... maybe more. If the dept is treating a large number of PN patients, they will have the specialists to treat you properly.

If they do research in PN, they will have PN specialists.