Dr. James S. Chang is an oncologist in San Francisco, California and is affiliated with Kaiser Permanente Santa Clara Medical Center. He received his medical degree from Icahn School of Medicine at Mount Sinai and has been in practice for more than 20 years. Dr. James S. Chang has expertise in treating chronic leukemia, breast cancer, among other conditions - see all areas of expertise. Dr. James S. Chang accepts Medicare, Kaiser - see other insurance plans accepted.