internist

1. internist; specialist in internal medicine
   Internist mi je prepisao nove analize krvi. — The internist ordered new blood tests for me.
   Moram da zakažem pregled kod interniste. — I need to book an appointment with the internist.

In standard Serbian the usual form is "internista" (like specijalista, pijanista; gen. interniste, dat. internisti); "internist" is mainly Croatian usage. In Serbia this is a specialist in internal medicine, not a general practitioner (lekar opšte prakse).