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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).

Learn more about Dr. Frederick Ruymann:

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  1. Qualifications
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Patient Reviews

Patient comments (4)

The overall average patient rating of Dr. Frederick Ruymann is Good. Dr. Ruymann has been reviewed by 13 patients who have provided 4 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.0
Promptness 3.2
Courteous Staff 2.6
Accurate Diagnosis 3.2
Bedside Manner 3.2
Spends Time with Me 3.4
Follows Up After Visit 3.0

Specialties & Research

Dr. Frederick Ruymann, MD is board certified in Gastroenterology.

Education & Awards

Dr. Ruymann graduated from Case Western Reserve University , Cleveland. He has 1 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. Ruymann has 8 hospital affiliations:

  • Massachusetts General Hospital 
  • Beth Israel Deaconess Medical Center 


  • Chinese
  • Creole
  • French
  • Russian
  • Spanish

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Additional Information
Dr. Frederick William Ruymann MD is a male Internist, has 24 years of experience and practices in Gastroenterology.
Where does Dr. Frederick W. Ruymann practice?
Dr. Frederick Ruymann has 4 office locations.
Dr. Frederick Ruymann practices Gastroenterology near Cambridge, MA.
Additional practice locations include: Watertown, MA.
See Cambridge Gastroenterologists.