Dr. Andrew C. Chang is a gastroenterologist in Grass Valley, California and is affiliated with multiple hospitals in the area, including Sierra Nevada Memorial Hospital and Loma Linda University Medical Center. He received his medical degree from Loma Linda University School of Medicine and has been in practice for more than 20 years. Dr. Andrew C. Chang has expertise in treating colonoscopy, upper gi endoscopy, gastroenteritis, among other conditions - see all areas of expertise. Dr. Andrew C. Chang accepts Medicare, Aetna, Humana, Blue Cross, United Healthcare - see other insurance plans accepted.