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Internist, Sleep Medicine Specialist
34 years of experience
Video profile
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 (8)

The overall average patient rating of Dr. John Grigas is Below Average. Dr. Grigas has been reviewed by 14 patients who have provided 8 comments. The rating is 2 out of 5 stars.

Patient Ratings
Ease of Appointment 2.2
Promptness 2.3
Courteous Staff 2.7
Accurate Diagnosis 3.1
Bedside Manner 2.2
Spends Time with Me 2.0
Follows Up After Visit 2.1

Specialties & Research

Dr. John Grigas, MD is board certified in Internal Medicine and Sleep Medicine.

Education & Awards

Dr. Grigas graduated from University of Florida, Gainesville.


Dr. Grigas has 7 hospital affiliations:

  • Baptist Medical Center 
  • Baptist - South 


  • English

> > > > Dr. John Grigas, MD

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Additional Information
Dr. John Daniel Grigas MD is a male Internist, has 34 years of experience and practices in Internal Medicine and Sleep Medicine.
Where does Dr. John D. Grigas practice?
Dr. John Grigas has 4 office locations.
Dr. John Grigas practices Internal Medicine and Sleep Medicine near Jacksonville, FL.
See Jacksonville Internists and Jacksonville Sleep Medicine Doctors.