Lineage. Constituted as 809 Medical Group on 6 Oct 1958. Activated on 1 Jan 1959. Discontinued, and inactivated, on 1 Jul 1962. Activated on 21 Feb 1963. Organized on 1 Jul 1963. Redesignated as: USAF Hospital, F. E. Warren on 1 Oct 1970; 90 Strategic Hospital on 1 Jul 1987; 90 Medical Group