I need some clarification regarding the time obligation accrued and other pertinent details of accepting the Navy HPSP. More specifically, what would my payback be if I wanted to do a fellowship in the Navy in addition to residency? Also, does the Navy count one's internship year toward the residency requirement for a Primary Care specialty? I am looking into Gastroenterology and was wondering how difficult it would be to get a "GI" fellowship in the Navy. Finally, is serving on a shipboard deployment (>3 months) required? Likely? Your responses are greatly appreciated.