The fifth volume in a 10-volume report on the historical development (1966-1973) of the 8 administrative Area Offices of the Indian Health Service (IHS) Mental Health Programs, this report presents information on the Billings Area Office. Included in this document are: (1) General Description (geography, demography, and transportation facilities and problems); (2) Social Service Branch Sponsorship Prior to 1969 (development of consultation contracts 1963-68, report prepared for budget hearings December 1968, and outline for Mental Health Career Development Fellowship Hearings December 1968); (3) Continuity: First Chief of Billings' Mental Health Programs (expanding the role learned as a resident, expansion of service unit staffing, serving as an IHS consultant); (4) Discontinuity: Second Chief of Mental Health Programs (two chiefs at once, a new model of service standards, status and power struggles mirrored in the service units, and educational network developed); (5) Efforts to Restore Stability (Associate Arts degree in human services contract, alcoholism program, and decentralized deployment staff); (6) Current Status of Service Unit Programs: 1973 (program descriptions of: Blackfeet, Flathead, Rocky Boy's, Fort Belknap, Fort Peck, Crow, Northern Cheyenne, and Wind River reservations; Intermountain School; and detoxification programs); (7) Summary and Concluding Comments (achievements and problems). (JC)