Alameda Health System (AHS) is a public health care provider and medical training institution in Oakland, California. It is a network of hospitals, clinics, and health services that provides medical care to Alameda County residents. AHS is a safety-net provider, meaning it serves a high proportion of low-income and uninsured patients. The system includes four hospitals, four wellness centers, and a skilled nursing facility. AHS also operates residency programs for physicians and other medical professionals.