Mark Epstein

Areas of Care:

Board Certified Gastroenterologist

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Specialty

Colonoscopy
Upper Endoscopy
Hemorrhoids
Gastroesophageal Reflux Disease (GERD)
Irritable Bowel Syndrome (IBS)
Celiac Disease
Ulcerative Colitis
Abdominal Pain

Dr. Mark Epstein has more than 30 years in medical training and experience. He is board certified in Gastroenterology. He earned his medical degree from University of Witwatersrand Medical School in South Africa. Internal Medicine Residency, Gastroenterology fellowship at Tufts Medical Center. Previous faculty Tufts Medical Center. Service Chief of Gastroenterology at Emerson Hospital in Concord, MA. He is currently the president elect for Emerson Hospital Medical Staff and past chief of Gastroenterology at Emerson Hospital. Most notably, he was recognized as one of Boston Magazine’s “Top Doctors” in both 2020 and 2021 and 2025. Click here to read more!

Dr. Epstein was recently featured in Everyday Health, where he shared expert insights on natural remedies for digestive discomfort in the article “11 Best Natural Remedies for Upset Stomach Relief.”

Honors and Awards

Boston Magazine’s Top Doctors Awards 2025

Patient Satisfaction

Dr. Epstein’s ratings are among the best for Acton Gastroenterologists, receiving a combined average rating of more than four stars on Healthgrades and Vitals. Among his highest ratings are his accurate diagnosis, bedside manner and time spent with patient. One five-star reviewer says:

“Dr. Epstein is great in every dimension of patient care. He takes time to explain a procedure in advance and then ensures your satisfaction after the procedure. I highly recommend him.”