Combat Corpsman.
An enlisted person in the U.S. Navy who has been trained to serve with the Marine Corps by giving first aid and basic medical treatment, especially in combat situations.
Hospital Corpsmen (HMs) are members of the United States Navy Hospital Corps. They serve as enlisted medical personnel. Corpsmen serve in a wide variety of capacities and locations, including shore establishments such as naval hospitals and clinics, aboard ships as the primary medical caregivers for sailors while underway, or with Marine Corps units as battlefield corpsmen, the Marines' equivalent to Army medics. The Hospital Corps is the only all enlisted Corps in the United States military.
The Hospital Corps is the single most decorated rating of all branches of the U.S. military. Twenty-three Hospital Corpsmen have received the Medal of Honor, the most of any single group in the U.S. Navy. Fourteen ships have been named after Hospital Corpsmen.