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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 (3)

The overall average patient rating of Dr. John Koval is Excellent. Dr. Koval has been reviewed by 17 patients who have provided 3 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.0
Promptness 3.2
Courteous Staff 4.4
Accurate Diagnosis 5.0
Bedside Manner 4.6
Spends Time with Me 4.6
Follows Up After Visit 4.2

Specialties & Research

Dr. John Koval, MD is board certified in Internal Medicine.

Education & Awards

Dr. Koval graduated from Medical College of Ohio, Toledo. He has 3 awards.

Patients' Choice 5th Anniversary Award (2012)
Patients' Choice Award (2008 - 2012, 2014)
Compassionate Doctor Recognition (2010, 2012)


Dr. Koval has 9 hospital affiliations:

  • Trumbull Memorial Hospital 
  • HMHP St Elizabeth Health Center 


  • English

> > > > Dr. John Koval, MD

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Additional Information
Dr. John Michael Koval MD is a male Internist, has 31 years of experience and practices in Internal Medicine.
Where does Dr. John M. Koval practice?
Dr. John Koval has 1 office location.
Dr. John Koval practices Internal Medicine near Youngstown, OH.
See Youngstown Internists.