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Gastroenterologists in Wisconsin

Data updated monthly · Last refresh October 2026

341 Gastroenterology providers practice in Wisconsin, including 82 (24%) offering telehealth. The largest concentration is in Milwaukee. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

341providers
82telehealth
Milwaukeetop city

Gastroenterology by city in Wisconsin

Choose a city to see providers there.

Gastroenterology in Milwaukee100 providers
Gastroenterology in Madison62 providers
Gastroenterology in Eau Claire20 providers
Gastroenterology in La Crosse18 providers
Gastroenterology in Green Bay18 providers
Gastroenterology in Wausau11 providers
Gastroenterology in Mequon9 providers
Gastroenterology in Marshfield9 providers
Gastroenterology in Sheboygan7 providers
Gastroenterology in Oshkosh6 providers
Gastroenterology in Kenosha5 providers
Gastroenterology in Beloit5 providers
Gastroenterology in Menomonee Falls5 providers
Gastroenterology in Fond Du Lac4 providers
Gastroenterology in Janesville4 providers
Gastroenterology in West Allis4 providers
Gastroenterology in Monroe3 providers
Gastroenterology in Ashland3 providers
Gastroenterology in Weston3 providers
Gastroenterology in Summit3 providers
Gastroenterology in Waukesha3 providers
Gastroenterology in Manitowoc3 providers
Gastroenterology in Wauwatosa3 providers
Gastroenterology in Cudahy3 providers

Gastroenterology providers in Wisconsin

Listed by city, largest first. 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. Annette Glasser, CNP
Madison, WI · No drug or device payments recorded (2025) · (608) 263-8094
Dr. Antonio Bosch, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5000
Dr. Anurag Soni, MD
Madison, WI · $131 in drug and device payments (2025) · Telehealth · (608) 265-8528
Dr. Arnold Wald, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-8094
Dr. Bryan Magenheim, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 287-2680
Dr. Christopher Lindholm, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5090
Dr. Daniel Smith, MD
Madison, WI · $75 in drug and device payments (2025) · (608) 287-2680
Dr. Deepak Gopal, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-8094
Dr. Eric Gaumnitz, MD
Madison, WI · $121 in drug and device payments (2025) · Telehealth · (608) 263-8094
Dr. Franklyn Wallace, MD
Madison, WI · $40 in drug and device payments (2025) · (507) 284-2511
Dr. Freddy Caldera, D.O.
Madison, WI · $20,468 in drug and device payments (2025) · Telehealth · (608) 263-1995
Dr. Gabriela Lobato
Madison, WI · $35 in drug and device payments (2025) · Telehealth · (608) 890-5090
Dr. Gabrielle Waclawik, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 916-0400
Dr. Gary Griglione, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 417-5454
Dr. Gregory Nelligan, M.D.
Madison, WI · No drug or device payments recorded (2025) · (608) 256-1901
Dr. Harsh Patel
Madison, WI · No drug or device payments recorded (2025) · (608) 263-8094
Dr. Ian Grimes, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5000
Dr. Jameel Alp, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 263-6400
Dr. James Vandermeer, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 252-8000
Dr. Jason Gonzaga, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 260-2900
Dr. Jason Stangl, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 287-2680
Dr. Jihad Aljabban, MD, MMSC
Madison, WI · $110 in drug and device payments (2025) · (608) 263-6400
Dr. John Hamilton, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 260-2900
Dr. John Rice, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 265-8528
Dr. John Williams, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 287-2680
Dr. Katelyn Backhaus, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 263-6400
Dr. Kerstin Austin, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-5660
Dr. Lisa Strate, M.D. MPH
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5090
Dr. Lucas Fass
Madison, WI · $35 in drug and device payments (2025) · (608) 628-3664
Dr. Luis Lomeli, MD
Madison, WI · $2,769 in drug and device payments (2025) · Telehealth · (608) 263-4034
Dr. Mansoor Shariff, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5000
Dr. Mark Benson, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-8094
Dr. Mark Reichelderfer, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 238-8235
Dr. Marmy Shah, M.D.
Madison, WI · $37 in drug and device payments (2025) · (608) 916-0400
Dr. Mary Ryan, MD
Madison, WI · $35 in drug and device payments (2025) · (608) 263-6400
Dr. Matthew Caldis, M.D., M.S.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5090
Dr. Matthew Ewy, MD, RD, CNSC
Madison, WI · No drug or device payments recorded (2025) · (608) 263-0572
Dr. Megan Lutz
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 890-5090
Dr. Michael Allan, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 260-2900
Dr. Michael Dybala
Madison, WI · No drug or device payments recorded (2025) · (608) 263-6400
Dr. Naree Whang, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 260-2900
Dr. Omar Calderon, MD
Madison, WI · No drug or device payments recorded (2025) · (813) 259-0670
Dr. Patrick Hoversten, M.D
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 260-2900
Dr. Patrick Pfau, MD
Madison, WI · $242 in drug and device payments (2025) · Telehealth · (608) 263-8094
Dr. Paul Estrada, M.D.
Madison, WI · $51 in drug and device payments (2025) · Telehealth · (210) 215-8676
Dr. Paulina Phillips, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-6400
Dr. Praveena Narayanan, MD
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 263-1384
Dr. Rodrigo Castillo, MD
Madison, WI · $125 in drug and device payments (2025) · Telehealth · (608) 890-5090
Dr. Sigurdur Einarsson, MD
Madison, WI · No drug or device payments recorded (2025) · (608) 260-2900
Dr. Siobhan Byrne, M.D.
Madison, WI · No drug or device payments recorded (2025) · Telehealth · (608) 287-2680

Conditions Gastroenterology providers in Wisconsin 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 Wisconsin?

There are 341 Gastroenterology providers with active NPI records practicing in Wisconsin, according to federal NPPES data refreshed monthly.

Do Gastroenterology providers in Wisconsin offer telehealth?

Yes. 82 of the 341 Gastroenterology providers in Wisconsin (about 24%) report offering telehealth services in CMS data.

Which cities in Wisconsin have the most Gastroenterology providers?

Milwaukee (100), Madison (62), Eau Claire (20) have the highest concentration of Gastroenterology providers in Wisconsin.

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

123 of 341 Gastroenterology providers in Wisconsin (36%) 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 Wisconsin treat?

Gastroenterology providers 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 counts and profiles 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.

Do most Gastroenterologists in Wisconsin work in independent practices or large health systems?

Among 216 Gastroenterologists in Wisconsin enrolled in Medicare, 3% bill through a solo or small practice with fewer than 10 clinicians, 16% through a mid-size group of 10 to 99, and 81% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Gastroenterologists in Wisconsin work at?

According to CMS facility affiliation records, the Wisconsin hospitals where the most Gastroenterologists hold privileges are Aurora St Lukes Medical Center in Milwaukee; University of Wi Hospitals & Clinics Authority in Madison; Unitypoint Health - Meriter in Madison.

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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. Are you a Gastroenterology in Wisconsin? Get featured.