This DoDD states that the ASD(HA) is the principal advisor to the U.S. Secretary of Defense on all "DoD health policies, programs and activities."

In addition to exercising oversight of all DoD health resources, ASD(HA) serves as director of the Tricare Management Activity.

A political appointee responsible for the United States Department of Defense's Military Health System, the ASD(HA) is an Executive Service Level IV official.

In January 1976, the position was re-designated Assistant Secretary of Defense (Health Affairs), a title that has endured to the present day.

Leon Panetta Chuck Hagel Ashton Carter Persons marked with a * are interim officials described in military documents as "Performing the Duties of the ASD/HA," rather than as "Acting"