Dr. Mark J. Sterling is a gastroenterologist in Pittsfield, Massachusetts and is affiliated with Berkshire Medical Center. He received his medical degree from New York Medical College and has been in practice for more than 20 years. Dr. Mark J. Sterling has expertise in treating colonoscopy, upper gi endoscopy, inflammatory bowel disease (ibd), among other conditions - see all areas of expertise. Dr. Mark J. Sterling accepts Medicare, Aetna, Blue Cross, United Healthcare - see other insurance plans accepted.