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Internal Medicine in Williamsville, New York

Data updated monthly · Last refresh September 2026

65 Internal Medicine providers practice in Williamsville, and 48% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine 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. Aalia Khan, MD
Williamsville, NY · No drug or device payments recorded (2025) · (609) 585-1122
Dr. Allyn Norman, D.O.
Williamsville, NY · $504 in drug and device payments (2025) · (716) 204-4532
Dr. Anderson Lai, MD
Williamsville, NY · $78 in drug and device payments (2025) · (716) 568-3514
Dr. Annaliese Noack, DO
Williamsville, NY · $18 in drug and device payments (2025) · Telehealth · (716) 677-6060
Dr. Benjamin Zwierzchowski, MD, MS
Williamsville, NY · No drug or device payments recorded (2025) · Telehealth · (716) 656-4459
Dr. Bonnie Mcmichael, M.D.
Williamsville, NY · $600 in drug and device payments (2025) · (716) 565-1234
Dr. Brian Karaszewski, M.D.
Williamsville, NY · $4,057 in drug and device payments (2025) · (716) 631-3555
Dr. Caroline Jones, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 656-4880
Dr. Cheng Fu, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 633-0540
Dr. Chidimma Oduwegwu, M.D.
Williamsville, NY · $696 in drug and device payments (2025) · (716) 899-4772
Dr. Chi-teh Yu, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 630-6660
Dr. Christine Weckerle, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 510-1629
Dr. Colleen Klos
Williamsville, NY · $2,459 in drug and device payments (2025) · Telehealth · (716) 568-3514
Dr. Devamohan Sivalingam, MD
Williamsville, NY · $179 in drug and device payments (2025) · (716) 389-3240
Dr. Dukhant Multani, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 568-3514
Dr. Eric Koch, DO
Williamsville, NY · No drug or device payments recorded (2025) · (716) 635-0688
Dr. Eric Thierman, MD
Williamsville, NY · $713 in drug and device payments (2025) · (716) 634-5410
Dr. Eric Waffner, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · Telehealth · (716) 630-1072
Dr. Foong Ming Lam, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-3033
Dr. Frank Voelker, DO
Williamsville, NY · No drug or device payments recorded (2025) · Telehealth · (716) 810-9967
Dr. Gaurav Jain, MD
Williamsville, NY · $439 in drug and device payments (2025) · Telehealth · (716) 631-3555
Dr. George Burnett, MD
Williamsville, NY · $375 in drug and device payments (2025) · (716) 565-3605
Dr. George Kotlewski, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 632-4242
Dr. Gina Mangione, MD
Williamsville, NY · $984 in drug and device payments (2025) · Telehealth · (716) 626-2644
Dr. Harbind Brar, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 961-9900
Dr. Hong Yu Wen, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 630-1182
Dr. Ihab Shafik, MD
Williamsville, NY · $35 in drug and device payments (2025) · (716) 632-1400
Dr. Irene Snow, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 630-1167
Dr. James Rycyna, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 634-3502
Dr. Jeffrey Burnett, DO
Williamsville, NY · $1,753 in drug and device payments (2025) · Telehealth · (716) 565-3605
Dr. John Cleary
Williamsville, NY · No drug or device payments recorded (2025) · (716) 568-3600
Dr. John Hall, MD
Williamsville, NY · $91 in drug and device payments (2025) · (716) 635-0688
Dr. John Leone, D.O.
Williamsville, NY · $1,134 in drug and device payments (2025) · (716) 565-1234
Dr. Jorge Flores Lopez, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 580-7355
Dr. Joseph Gualtieri, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 631-3555
Dr. Kapil Chatrath, MD
Williamsville, NY · $3,495 in drug and device payments (2025) · (716) 630-1163
Dr. Kenneth Zimmerman, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 626-0030
Dr. Kenyani Davis, M.D.
Williamsville, NY · $155 in drug and device payments (2025) · (716) 961-9900
Dr. Louis Irmisch, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 565-3605
Dr. Luay Dawood, M.D.
Williamsville, NY · $84 in drug and device payments (2025) · (716) 568-3600
Dr. Lynn Cieslak, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 481-7384
Dr. Margaret Mitchell, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 689-4800
Dr. Maria Kontos, DO
Williamsville, NY · No drug or device payments recorded (2025) · (716) 656-4463
Dr. Marissa Boniszewski
Williamsville, NY · $65 in drug and device payments (2025) · Telehealth · (716) 656-4868
Dr. Mary Mcgorray, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 630-1159
Dr. Mohammed Ahmed, MD
Williamsville, NY · $146 in drug and device payments (2025) · (716) 568-3600
Dr. Nicole Riedy, D.O.
Williamsville, NY · $637 in drug and device payments (2025) · (716) 634-5410
Dr. Peter Elkin, M.D.
Williamsville, NY · No drug or device payments recorded (2025) · (716) 888-4858
Dr. Philip Fu, MD
Williamsville, NY · No drug or device payments recorded (2025) · Telehealth · (716) 633-0541
Dr. Polina Purizhansky, MD
Williamsville, NY · No drug or device payments recorded (2025) · (716) 630-1014

Conditions Internal Medicine providers in Williamsville, New York commonly treat

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

Common questions

How many Internal Medicine providers are in Williamsville, New York?

There are 65 Internal Medicine providers with active NPI records practicing in Williamsville, according to federal NPPES data refreshed monthly.

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

31 of 65 (48%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Internal Medicine providers in Williamsville treat?

Internal Medicine providers in Williamsville commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management 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 Internal Medicine 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.