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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).

Learn more about Dr. Glen Vanderzalm:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (4)

The overall average patient rating of Dr. Glen Vanderzalm is Excellent. Dr. Vanderzalm has been reviewed by 9 patients who have provided 4 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.8
Promptness 4.6
Courteous Staff 4.8
Accurate Diagnosis 4.4
Bedside Manner 4.6
Spends Time with Me 4.4
Follows Up After Visit 4.4

Specialties & Research

Dr. Glen Vanderzalm, MD is board certified in Gastroenterology.

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Vanderzalm graduated from Marshall University , Huntington.


Dr. Vanderzalm has 9 hospital affiliations:

  • Orlando Health South Seminole Hospital 
  • Arnold Palmer Medical Center 


  • Spanish

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Additional Information
Dr. Glen E Vanderzalm MD is a male Internist, has 24 years of experience and practices in Gastroenterology.
Where does Dr. Glen E. Vanderzalm practice?
Dr. Glen Vanderzalm has 1 office location.
Dr. Glen Vanderzalm practices Gastroenterology near Orlando, FL.
See Orlando Gastroenterologists.