Browse Health
Gastroenterologist (digestive)
41 years of experience
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 (1)

The overall average patient rating of Dr. Marc Harwitt is Excellent. Dr. Harwitt has been reviewed by 11 patients who have provided 1 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.1
Courteous Staff 5.0
Accurate Diagnosis 4.2
Bedside Manner 4.4
Spends Time with Me 4.4
Follows Up After Visit 3.5

Specialties & Research

Dr. Marc Harwitt, MD is board certified in Gastroenterology.

  • He has special expertise in 7 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Colonoscopy
  • Constipation
  • Hepatitis C
  • Ichthyosis Bullosa of Siemens
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Harwitt graduated from Rosalind Franklin University, North Chicago. He has 1 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. Harwitt has 3 hospital affiliations:

  • St. John's Hospital & Health Center 
  • Santa Monica - UCLA Medical Center 
  • Saint John's Health Center 


  • Spanish

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Additional Information
Dr. Marc Hugh Harwitt MD is a male Internist, has 41 years of experience and practices in Gastroenterology.
Where does Dr. Marc H. Harwitt practice?
Dr. Marc Harwitt has 2 office locations.
Dr. Marc Harwitt practices Gastroenterology near Santa Monica, CA.
See Santa Monica Gastroenterologists.