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Internist, Gastroenterologist (digestive)
26 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Dan Trellis is Good. Dr. Trellis has been reviewed by 13 patients who have provided 3 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 3.7
Courteous Staff 3.9
Accurate Diagnosis 3.9
Bedside Manner 3.9
Spends Time with Me 3.9
Follows Up After Visit 3.9

Specialties & Research

Dr. Dan Trellis, MD is board certified in Internal Medicine and Gastroenterology.

  • He has special expertise in 6 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Gastroparesis
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Trellis graduated from Duke University , Durham.


Dr. Trellis has 14 hospital affiliations:

  • UPMC Presbyterian/Shadyside 
  • UPMC South Side 

> > > > Dr. Dan Trellis, MD

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Additional Information
Dr. Dan Robert Trellis MD is a male Internist, has 26 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. Dan R. Trellis practice?
Dr. Dan Trellis has 6 office locations.
Dr. Dan Trellis practices Internal Medicine and Gastroenterology near Pittsburgh, PA.
Additional practice locations include: New Kensington, PA and Cranberry Twp, PA.
See Pittsburgh Internists and Pittsburgh Gastroenterologists.