The Indian Health Service (IHS) Tucson Area Service Unit delivers a comprehensive, federal continuum of primary care medicine, inpatient psychiatric stabilization, and specialized tribal health home navigation across Pima County. Operating a high-volume healthcare network to serve the Tohono O'odham Nation and eligible Native Americans, the system coordinates vital resource lines across multiple locations:
- Sells Indian Hospital - State Route 86: anchors centralized inpatient medical blocks, a 24/7 emergency department, and trauma interventions
- San Simon Health Center - Milepost 74: provides western desert frontier outpatient family practice, optometry, and an on-site prescription pharmacy
- San Xavier Health Center - S J Stock Rd: hosts focused metropolitan behavioral health tracking and diagnostic laboratories
- Santa Rosa Health Center: supplies remote northern sector urgent care, pairing its network-wide treatments with embedded Tohono O'odham Behavioral Health counseling teams, Benefit Coordinators, and the Tohono O'odham Health Transportation program to eliminate structural access barriers and ensure long-term lifestyle stabilization.