HealthcareDiscovery.AI / Doctors / New York / Williamsville / Gastroenterology

Gastroenterology in Williamsville, New York

Data updated monthly · Last refresh September 2026

34 Gastroenterology providers practice in Williamsville, and 82% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Gastroenterology providers in Williamsville

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Abha Rani, MD
Williamsville, NY · $397 in drug and device payments (2025) · (716) 630-2517
Dr. Ahmad Kadhim, M.D
Williamsville, NY · $60,582 in drug and device payments (2025) · (716) 626-2644
Dr. Alok Gupta, MD
Williamsville, NY · $634 in drug and device payments (2025) · Telehealth · (716) 631-2517
Dr. Antonino Mannone, M.D.
Williamsville, NY · $1,154 in drug and device payments (2025) · (716) 632-3577
Dr. Benjamin Schaus, D.O.
Williamsville, NY · $1,830 in drug and device payments (2025) · (716) 626-5250
Dr. Christopher Bartolone, M.D.
Williamsville, NY · $640 in drug and device payments (2025) · (716) 626-5250
Dr. Clark Zhang
Williamsville, NY · $1,564 in drug and device payments (2025) · (716) 626-5250
Dr. Craig Keller, M.D.
Williamsville, NY · $619 in drug and device payments (2025) · (716) 626-5250
Dr. David Fay, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-5250
Dr. David Garson, M.D.
Williamsville, NY · $1,370 in drug and device payments (2025) · (716) 626-5250
Dr. Henri Woodman, M.D.
Williamsville, NY · $133 in drug and device payments (2025) · (716) 626-2644
Dr. James Corasanti, MD, PHD
Williamsville, NY · $355 in drug and device payments (2025) · Telehealth · (716) 677-4414
Dr. James Piscatelli, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 631-2157
Dr. Jerald Giller, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-5250
Dr. John Picano, M.D.
Williamsville, NY · $1,131 in drug and device payments (2025) · (716) 626-5250
Dr. Joseph Caruana, M.D.
Williamsville, NY · $146 in drug and device payments (2025) · (716) 565-3990
Dr. Mark St Marie, MD
Williamsville, NY · $135 in drug and device payments (2025) · Telehealth · (716) 626-2644
Dr. Matthew Hudson, MD
Williamsville, NY · $150 in drug and device payments (2025) · Telehealth · (716) 626-2644
Dr. Maya Srivastava, MS MD PHD
Williamsville, NY · $365,400 in drug and device payments (2025) · Telehealth · (716) 688-0525
Dr. Michael Kozower, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-5250
Dr. Naima Mian, D.O.
Williamsville, NY · $174 in drug and device payments (2025) · (716) 626-5250
Dr. Natalie Penn, MD
Williamsville, NY · $2,322 in drug and device payments (2025) · (716) 626-5250
Dr. Ognian Pomakov, MD
Williamsville, NY · $102 in drug and device payments (2025) · (716) 626-5250
Dr. Peter Bloom, M.D.
Williamsville, NY · $1,428 in drug and device payments (2025) · (716) 626-5250
Dr. Peter Fields, MD
Williamsville, NY · $225 in drug and device payments (2025) · (716) 626-5250
Dr. Randy Cheung, MD
Williamsville, NY · $99 in drug and device payments (2025) · (716) 626-2644
Dr. Raymond Tuoti, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-5250
Dr. Richard Kaplan, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-5250
Dr. Saman Chubineh, MD
Williamsville, NY · $2,783 in drug and device payments (2025) · Telehealth · (716) 240-2296
Dr. Shahid Mehboob, MD
Williamsville, NY · $241 in drug and device payments (2025) · (716) 626-5250
Dr. Siddhartha Shah, M.D.
Williamsville, NY · $162 in drug and device payments (2025) · (716) 626-5250
Dr. Stanley Pietrak, M.D.
Williamsville, NY · $549 in drug and device payments (2025) · (716) 626-5250
Dr. Thomas Malikowski, M.D.
Williamsville, NY · $662 in drug and device payments (2025) · (166) 265-2507
Dr. Yogesh Maheshwari, M.D.
Williamsville, NY · $898 in drug and device payments (2025) · (716) 626-5250

Conditions Gastroenterology providers in Williamsville, New York commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Gastroenterology providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Gastroenterology providers are in Williamsville, New York?

There are 34 Gastroenterology providers with active NPI records practicing in Williamsville, according to federal NPPES data refreshed monthly.

How many Gastroenterology providers in Williamsville received drug or device company payments?

28 of 34 (82%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Gastroenterology providers in Williamsville treat?

Gastroenterology providers in Williamsville commonly treat acid reflux, IBS, Crohn disease, ulcerative colitis, celiac disease and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Williamsville Gastroenterology across New York

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.