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

Dr. Arnold Robert Leiboff, MD

Individual provider Colon & Rectal Surgery Physician · NPI 1154322188

Dr. Arnold Robert Leiboff, MD is a Colorectal Surgery (Proctology) in East Setauket, New York. Graduated from New York Medical College in 1978, 48 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New York.

Years since qualifying
48
Trained at
New York Medical College
Licensed in
NY
In the registry since
2005
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

3400 Nesconset Hwy Ste 100
East Setauket, NY 11733
Phone: (631) 689-2600
Fax: (631) 689-2943
Show map & directions

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

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence 142014 (NY)

Record details

NPI number1154322188
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 1, 2005
Last updated in NPPESJuly 1, 2014

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCOLORECTAL SURGERY (PROCTOLOGY)
Also practisesGENERAL SURGERY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1978 (48 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount