Medical specialist

A medical specialist was someone who specialized in a medical field.

In 2267, medical and engineering specialists from the USS Enterprise (NCC-1701) beamed aboard the SS Botany Bay to examine the ship and its occupants. 

In, Kieran MacDuff mentioned that the USS Enterprise (NCC-1701-D) was full of science officers, medical specialists and engineers, as well as Jean-Luc Picard, a diplomat, but that he and Worf, the security chief, were born warriors and needed to be prepared to take action against the Lysians at a moment's notice.