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Dr. Denise Harnois, DO
Internist, Gastroenterologist (digestive), Hepatologist
21 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).

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. Denise Harnois is Excellent. Dr. Harnois has been reviewed by 1 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. Denise Harnois, DO is board certified in Gastroenterology.

  • She has special expertise in 8 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Bile Duct inflammation (Sclerosing Cholangitis)
  • Cancer
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Liver Transplantation
  • Ulcerative Colitis

Education & Awards

Dr. Harnois graduated from Philadelphia College of Osteopathic Medicine.


Dr. Harnois has 2 hospital affiliations:

  • Saint Luke's Hospital 
  • Mayo Clinic hospital 

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Additional Information
Dr. Denise Marie Harnois DO is a female Internist, has 21 years of experience and practices in Internal Medicine, Gastroenterology, and Hepatology.
Where does Dr. Denise M. Harnois practice?
Dr. Denise Harnois has 1 office location.
Dr. Denise Harnois practices Internal Medicine, Gastroenterology, and Hepatology near Jacksonville, FL.
See Jacksonville Internists, Jacksonville Gastroenterologists, and Jacksonville Hepatologists.