California Physicians Service, Inc., doing business as Blue Shield of California, operates as a not-for-profit health plan for commercial, individual, and government markets in California. The company also provides life and disability insurance. California Physicians Service, Inc. was founded in 1939 and is based in San Francisco, California. The company has additional offices in El Segundo, Woodland Hills, El Dorado Hills, Fresno, Gold River, Irvine, Hemet, Lodi, Orange, Petaluma, Redding, Riverside, Sacramento, San Diego, San Jose, Santa Barbara, Walnut Creek, and Woodland.