About California Health Collaborative. The California Health Collaborative (Collaborative) is a nonprofit 501(c)3 organization committed to enhancing the quality of life and health of the people of California, particularly the underserved and underrepresented. Founded in 1982, the Collaborative has multiple offices throughout California, including Fresno, Hanford, Visalia, Chico, San Bernardino, and Sacramento, serving residents throughout the st...