San Diego County Outpatient Rehabs — Intensive Outpatient Program (IOP)

McAlister Institute's San Marcos location on Rancheros Drive provides intensive outpatient, outpatient, and detoxification services for substance use disorders. Founded in 1977, the nonprofit institute operates 24 programs across San Diego County with most locations accepting Medi-Cal (Medicaid). The San Marcos program also accepts Medicare and military insurance.

Lifeline Community Services, formerly North County Lifeline, provides intensive outpatient substance use treatment at its Oceanside location in northern San Diego County, California. The organization serves youth, adults, and families through behavioral health programs that address substance use, mental health, and emotional trauma. Lifeline is a 501(c)(3) nonprofit and accepts Medicare.