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

Dr. Robert D Pfeffer, MD

Individual provider Gastroenterology Physician · NPI 1558360172

Dr. Robert D Pfeffer, MD practises Gastroenterology in New York, New York. Graduated from New York University School of Medicine in 1984, 42 years ago. Practices with Optum Medical Care PC, a 1,018-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
42
Trained at
New York University School of Medicine
Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

317 E 34th St
New York, NY 10016-4974 Not confirmed with CMS for 19 years — call before visiting
Phone: (212) 726-7400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 162667 (NY)

Record details

NPI number1558360172
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 15, 2005
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolNEW YORK UNIVERSITY SCHOOL OF MEDICINE
Graduated 1984 (42 years in practice)
Group practice Optum Medical Care Pc — 1018 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 30 times · 56th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients476
Services billed 1,336 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Optum Medical Care PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1018 clinicians in the practice; 12 are shown here.

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