A medically necessary health care treatment or supply for which there is no medically appropriate substitute that can meet operational requirements.

A step or degree in a graduated scale of office or military rank that is established and designated as a grade by law or regulation.

A position of duty, trust, and authority to which an individual is appointed.

Twelve months, or less if reasonably anticipated to exceed 12 months.

The name (e.g., “Boatswain’s Mate”) prescribed for service members of a military service in an occupational field.

Individuals who have been identified as HIV-positive, are asymptomatic, and who have a clinically confirmed undetectable viral load.

Those deployable units that while at home station are treating only active duty personnel and Reserve Component members on duty status and not a component of an accredited Military Treatment Facility.

Routine operational environment at a fixed health care facility with an established scope of service, standard operating procedures, and permanent staff. 

Any disease or residual of an injury that results in a lessening or weakening of the capacity of the body or its parts to perform normally, according to accepted medical principles.

A syndrome of hyperthermia (core temperature at time of event usually ≥40^o C or 104^o F), physical collapse or debilitation, and encephalopathy as evidenced by delirium, stupor, or coma, occurring during or immediately following exertion or significant heat exposure. It can be complicated by organ or tissue damage, systemic inflammatory activation, and ...

Heat exhaustion with clinical evidence of organ or muscle damage without sufficient neurological symptoms to be diagnosed as heat stroke.

A syndrome of hyperthermia (core temperature at time of event usually ≤40^o C or 104^o F) with physical collapse or debilitation occurring during or immediately following exertion in the heat, with no more than minor central nervous system dysfunction (e.g., headache or dizziness).

Service-defined assessment of a service member’s ability to perform the duties of their office, grade, rank, or rating, considering their physical and psychological demands and tasks, medical history, and prognosis.

Applied to medical personnel, this includes all of the clinical and nonclinical individual and team requirements necessary to accomplish the deployed mission.

Medical and dental personnel who are authorized to provide health care services in military treatment facility or contract clinics by way of a personal services contract pursuant to Section 1091 of Title 10, United States Code or a non-personal services contract.