Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Mark Lowenheim, MD

Individual provider Pediatric Gastroenterology Physician · NPI 1285676429

Dr. Mark Lowenheim, MD is a Pediatric Gastroenterology Physician in Port Jefferson, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

200 Belle Terre Rd Ste 400
Port Jefferson, NY 11777-1928
Phone: (631) 403-4507
Fax: (631) 509-4614
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Gastroenterology Physician (primary) Taxonomy 2080P0206X · Licence 170700 (NY)

Record details

NPI number1285676429
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 12, 2006
Last updated in NPPESJune 15, 2015