Mental Health Systems Inc in Santee, founded in 1978 as a single psychiatric day-treatment center in North San Diego County, now operates as TURN Behavioral Health Services across 60-plus community-based programs throughout California. The Cuyamaca Street location delivers outpatient substance-use-disorder treatment — including cognitive behavioral therapy, motivational interviewing, trauma-focused counseling, and 12-step facilitation — within a behavioral-health corridor shared by Fusion Care Group at 8772 Cuyamaca Street. Dual-diagnosis programming addresses co-occurring mental health and substance-use conditions simultaneously, with specialized tracks for veterans, justice-involved individuals, and pregnant or postpartum patients. The ACTION East program at 10201 Mission Gorge Road extends the agency's East County footprint with intensive outpatient services and medication-assisted treatment, operating in the same Mission Gorge Road complex as Adema Family Medicine. Service infrastructure accepts Medicaid, Medicare, TRICARE, private insurance, and sliding-fee-scale payments, with multilingual intake available in English, Spanish, and American Sign Language across all TURN program sites statewide.