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Internist, Gastroenterologist (digestive)
14 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 (7)

The overall average patient rating of Dr. Mark Lemert is Excellent. Dr. Lemert has been reviewed by 12 patients who have provided 7 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.3
Promptness 4.5
Courteous Staff 4.8
Accurate Diagnosis 4.5
Bedside Manner 3.8
Spends Time with Me 4.0
Follows Up After Visit 4.2

Specialties & Research

Dr. Mark Lemert, MD is board certified in Internal Medicine and Gastroenterology.

  • He has special expertise in 10 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Colonoscopy
  • Constipation
  • Endoscopic Retrograde Cholangiopancreatography (ERCP)
  • Endoscopic Ultrasound (Fetoscopy)
  • Hepatitis
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis
  • Viral Human Hepatitis

Education & Awards

Dr. Lemert graduated from George Washington University.


Dr. Lemert has 14 hospital affiliations:

  • Nyu Hospital For Joint Diseases 
  • Englewood Hospital & Med Ctr 


  • Spanish

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Additional Information
Dr. Mark Stephen Lemert MD is a male Internist, has 14 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. Mark S. Lemert practice?
Dr. Mark Lemert has 1 office location.
Dr. Mark Lemert practices Internal Medicine and Gastroenterology near New York, NY.
See New York Internists and New York Gastroenterologists.