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Phone Outage

Baystate Health is currently experiencing a phone outage affecting many of our lines. We apologize for the inconvenience.
If you are experiencing a medical emergency, please call 911 immediately.
For non-emergency needs: If you have a MyBaystate patient portal account, please log in at mybaystate.baystatehealth.org and send a message to your care team.

Gastroenterology Faculty

All our faculty members are academic gastroenterologists with appointments at UMass Chan Medical School-Baystate.

Their expertise spans the gamut of gastroenterology, including advanced endoscopy, transplant hepatology, inflammatory bowel disease, and gastrointestinal motility.

Although they have wide-ranging clinical expertise and academic interests, what our faculty all have in common is their collegiality and a passion for teaching. You will receive superior training.

Program Director

Yesenia Greeff, MD

Associate Program Directors

Jacob Alexander, MD, DM

Mohammed Absar Ullah, MD

Other Faculty

Nha Duong, DO

Rony Ghaoui, MD

John Miller, MD

Jorge Sotelo, MD

Kais Zakharia, MD

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