After completion of A school, corpsmen may go directly to Fleet, or to medical treatment facilities (hospitals or clinics), or to Field Medical Training Battalion for eight weeks of additional training with Marines; or to C School.

Within the HM rating there are 38 occupational specialties which require further technical training via C-schools. Most specialty training is long and intense; many are at least one year in length. Some of the most demanding specialties, such as independent duty corpsmen, go through a series of schools as their career progresses. One of the specialties - Mortician - requires civilian licensing prior to entry into the Navy.

The diversity of the HM rating is evident with these Navy Enlisted Classifications (NECs).

Click the blue-highlighted links for additional information about that NEC.