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Dr. Dennis Riff, MD
Internist, Gastroenterologist
39 years of experience
Video profile
Doctor's site
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

  • Currently 3.5 of 4 stars
Patient comments (11)

The overall average patient rating of Dr. Dennis Riff, Internist, Gastroenterologist is Excellent. Dr. Riff has been reviewed by 23 patients who have provided 11 comments. The rating is 3.5 out of 4 stars.

Patient Ratings
Ease of Appointment 3.6
  • Currently 3.6315789473684 of 4 stars
Promptness 3.4
  • Currently 3.4444444444444 of 4 stars
Courteous Staff 3.7
  • Currently 3.6666666666667 of 4 stars
Accurate Diagnosis 3.6
  • Currently 3.5555555555556 of 4 stars
Bedside Manner 3.6
  • Currently 3.6111111111111 of 4 stars
Spends Time with Me 3.5
  • Currently 3.5294117647059 of 4 stars
Follows Up After Visit 3.4
  • Currently 3.3888888888889 of 4 stars

Specialties & Research

Dr. Dennis Riff, MD is board certified in Internal Medicine.

  • He has special expertise in 1 area:
  • Colonoscopy

Education & Awards

Dr. Riff graduated from Thomas Jefferson University, Philadelphia. He has 3 awards.

Patients' Choice Award (2011 - 2014)
Compassionate Doctor Recognition (2011 - 2013)
Top 10 Doctor - City (2014)
Orange, CA


Dr. Riff has 9 hospital affiliations:

  • Chapman Medical Center 
  • Anaheim Memorial Medical Center 


  • Korean
  • Spanish

> > > > Dr. Dennis Riff, MD

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Additional Information
Dr. Dennis Stone Riff MD is a male Internist, has 39 years of experience and practices in Internal Medicine.
Where does Dr. Dennis S. Riff practice?
Dr. Dennis Riff has 4 office locations.
Dr. Dennis Riff practices Internal Medicine near Orange, CA.
Additional practice locations include: Anaheim, CA.
See Orange Internists.