Community Health System is the largest health system in the Central Valley with a health plan, physic Community Health System is a private, not-for-profit healthcare network based in Fresno, California. We're led by local leaders and physicians focused on addressing the diverse needs and issues of central California. As the leading healthcare provider in the San Joaquin Valley, Community cares for more people in the region than any other. Community operates four hospitals, a cancer institute and several long-term care, outpatient and other healthcare facilities. Our mission is two-fold — to improve the health status of the community and promote medical education.