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Internist, Sleep Medicine Specialist
35 years of experience
Accepting new patients
Video profile
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. John Grigas:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (4)

The overall average patient rating of Dr. John Grigas is Below Average. Dr. Grigas has been reviewed by 12 patients who have provided 4 comments. The rating is 2 out of 5 stars.

Patient Ratings
Ease of Appointment 2.9
Promptness 2.9
Courteous Staff 2.9
Accurate Diagnosis 3.7
Bedside Manner 2.8
Spends Time with Me 2.6
Follows Up After Visit 3.0

Specialties & Research

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

  • He has special expertise in 1 area:
  • Insomnia

Education & Awards

Dr. Grigas graduated from University of Florida, Gainesville.


Dr. Grigas has 7 hospital affiliations:

  • Baptist Medical Center 
  • Baptist - South 


  • English

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Additional Information
Dr. John Daniel Grigas MD is a male Internist, has 35 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.