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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).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Mark Jonas is Excellent. Dr. Jonas has been reviewed by 24 patients who have provided 2 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 4.6
Courteous Staff 4.5
Accurate Diagnosis 4.7
Bedside Manner 5.0
Spends Time with Me 4.9
Follows Up After Visit 4.3

Specialties & Research

Dr. Mark Jonas, MD is board certified in Internal Medicine and Gastroenterology.

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Jonas graduated from State University of New York Downstate, Brooklyn. He has 3 awards.

Patients' Choice Award (2015)
Compassionate Doctor Recognition (2015)
On-Time Doctor Award (2015)


Dr. Jonas has 17 hospital affiliations:

  • Adams County Hospital 
  • Jewish Hospital, The 


  • German

> > > > Dr. Mark Jonas, MD

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Additional Information
Dr. Mark Edward Jonas MD is a male Internist, has 22 years of experience and practices in Internal Medicine, Gastroenterology, and Hepatology.
Where does Dr. Mark E. Jonas practice?
Dr. Mark Jonas has 2 office locations.
Dr. Mark Jonas practices Internal Medicine, Gastroenterology, and Hepatology near Cincinnati, OH.
See Cincinnati Internists, Cincinnati Gastroenterologists, and Cincinnati Hepatologists.