Partnership HealthPlan of California is a non-profit community based health care organization that contracts with the State to administer Medi-Cal benefits through local care providers to ensure Medi-Cal recipients have access to high-quality comprehensive cost-effective health care. Partnership provides quality health care to over 600,000 lives. Beginning in Solano County in 1994, Partnership now provides services to 14 Northern California counties - Del Norte, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Napa, Shasta, Siskiyou, Solano, Sonoma, Trinity and Yolo.