California Physicians' Service (Blue Shield of California)

Blue Shield of California is a tax-paying, nonprofit health plan headquartered in Oakland, California. Founded in 1939, its mission is to ensure all Californians have access to high-quality healthcare at an affordable price. The organization operates as an independent member of the Blue Shield Association.

The company provides a comprehensive range of health insurance services, including health, dental, and vision plans, as well as Medicare and Medi-Cal (Medicaid) options for individuals, families, and employers. It serves approximately 4.5 to 6 million members across California and offers various wellness programs, such as Wellvolution, to support member health.

In recent leadership changes, Mike Stuart was appointed President and CEO in August 2025, having served as interim CEO since March 2025. Blue Shield of California restructured in January 2025, establishing Ascendiun as its ultimate parent company. The organization was recognized by U.S. News & World Report in 2025 as a Best Company to Work For in both the Private Company and Health Care and Research categories. In June 2026, Blue Shield of California renewed its network agreement with Community Medical Centers, aiming to expand access to affordable healthcare in Fresno. However, the company also faced scrutiny in April 2026 regarding the denial of cancer treatment for a San Francisco firefighter.