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Pediatric Specialist, Gastroenterologist (digestive)
26 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).

Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. Mark Lowenheim is Average. Dr. Lowenheim has been reviewed by 9 patients who have provided 5 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 2.8
Promptness 2.8
Courteous Staff 3.4
Accurate Diagnosis 3.2
Bedside Manner 3.2
Spends Time with Me 3.2
Follows Up After Visit 3.0

Specialties & Research

Dr. Mark Lowenheim, MD is board certified in Pediatric Gastroenterology.

  • He has special expertise in 1 area:
  • Crohn's Disease

Education & Awards

Dr. Lowenheim graduated from Ross University, Edison. He has 1 awards.

Suffolk County Medical Society


Dr. Lowenheim has 8 hospital affiliations:

  • Stony Brook University Hospital 
  • John T Mather Memorial Hospital 


  • Urdu
  • French
  • Italian
  • Polish
  • Hindi
  • Spanish

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Additional Information
Dr. Mark Saul Lowenheim MD is a male Pediatric Gastroenterologist, has 26 years of experience and practices in Pediatric Gastroenterology.
Where does Dr. Mark S. Lowenheim practice?
Dr. Mark Lowenheim has 3 office locations.
Dr. Mark Lowenheim practices Pediatric Gastroenterology near Port Jefferson Station, NY.
Additional practice locations include: Port Jefferson, NY and Mount Sinai, NY.
See Port Jefferson Station Pediatric Specialists.