Pediatric Gastroenterologists in Wisconsin
Data updated monthly · Last refresh October 2026
55 Pediatric Gastroenterology providers practice in Wisconsin. 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.
55providers
Milwaukeetop city
Pediatric Gastroenterology by city in Wisconsin
Choose a city to see providers there.
Where Pediatric Gastroenterologists in Wisconsin practice
From CMS Medicare enrollment records covering 9 of the 55 providers listed here (16%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Pediatric Gastroenterologists | All clinicians in group | Main city |
| Childrens Specialty Group Inc. | 4 | 206 | Milwaukee |
| Mchs Hospitals Inc. | 2 | 1,195 | Marshfield |
| Gi Associates LLC | 2 | 55 | Franklin |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Pediatric Gastroenterologists affiliated |
| Marshfield Medical Center | Marshfield | Nonprofit | 1 of 5 | 2 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Pediatric 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. Douglas Zabrowski, M.D.Appleton, WI · $105 in drug and device payments (2025) ·
(920) 969-5353 Dr. Zahra Nouri, MDGreenfield, WI · No drug or device payments recorded (2025) ·
(414) 246-6400 Dr. Myriah Zeien-tarantelli, MD MPHLa Crosse, WI · No drug or device payments recorded (2025) ·
(608) 782-7300 Dr. Sarah ColeLa Crosse, WI · $21 in drug and device payments (2025) ·
(608) 782-7300 Dr. Daniel O'connell, M.D. Dr. Dorota Jedrzejczak, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 320-3430 Dr. Heli Bhatt, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 915-0480 Dr. Istvan Danko, MD PHDMadison, WI · No drug or device payments recorded (2025) ·
(608) 265-7740 Dr. Jonathan Wong, DOMadison, WI · $2,892 in drug and device payments (2025) ·
(608) 263-6420 Dr. Katryn Furuya, MDMadison, WI · $6,267 in drug and device payments (2025) ·
(608) 890-9400 Dr. Luther Sigurdsson, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6420 Dr. Michael Yaffe, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 260-2900 Dr. Nissa Erickson, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6420 Dr. Robert Judd, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6420 Dr. Thomas RatchfordMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6420 Dr. Andrea Gosalvez Tejada, M.D.Marshfield, WI · No drug or device payments recorded (2025) ·
(715) 387-5267 Dr. Daryl Fish, DOMarshfield, WI · No drug or device payments recorded (2025) ·
(715) 387-5688 Dr. Erin Heredia, DNP, FNP-CMiddleton, WI · No drug or device payments recorded (2025) ·
(608) 890-9400 Dr. Abdul Aziz Elkadri, M.D.Milwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Adrian Miranda, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Alan Mayer, MDMilwaukee, WI · $25 in drug and device payments (2025) ·
(414) 908-6506 Dr. Alexis Gumm, M.D.Milwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Alfonso Martinez, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Amanda Wenzel, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Ankur Chugh, M.D.Milwaukee, WI · $75,430 in drug and device payments (2025) ·
(414) 266-3690 Dr. Ashleigh WatsonMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-2786 Dr. Bernadette Vitola, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Brianna Lemke, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Cara Mack, MDMilwaukee, WI · $3,840 in drug and device payments (2025) ·
(414) 266-3690 Dr. Christine Brichta, MD, MPHMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Diana Lerner, MDMilwaukee, WI · $1,897 in drug and device payments (2025) ·
(414) 266-3690 Dr. Ellen Blank, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Farhat Ashai-khan, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Gila Ginzburg, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-6670 Dr. Gisela Chelimsky, MDMilwaukee, WI · $124 in drug and device payments (2025) ·
(414) 266-3690 Dr. Grzegorz Telega, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Ifunanya Agbim, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Joann SamalikMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Jose Cabrera, M.D.Milwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Joshua Noe, M.D.Milwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-2850 Dr. Karen Zorek, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Karlo KovacicMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Katherine Vaidy, M.D.Milwaukee, WI · $850 in drug and device payments (2025) ·
(414) 266-6800 Dr. Katja Karrento, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Lena Sarhan, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 955-4575 Dr. Manu Sood, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Michael Schmalz, MDMilwaukee, WI · $15 in drug and device payments (2025) ·
(414) 908-6500 Dr. Rose LeeMilwaukee, WI · $1,488 in drug and device payments (2025) ·
(414) 266-3690 Dr. Steven Werlin, MDMilwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Dr. Tanyaporn Kaenkumchorn, M.D.Milwaukee, WI · No drug or device payments recorded (2025) ·
(414) 266-3690 Common questions
How many Pediatric Gastroenterology providers are in Wisconsin?There are 55 Pediatric Gastroenterology providers with active NPI records practicing in Wisconsin, according to federal NPPES data refreshed monthly.
Which cities in Wisconsin have the most Pediatric Gastroenterology providers?Milwaukee (35), Madison (11), Marshfield (2) have the highest concentration of Pediatric Gastroenterology providers in Wisconsin.
How many Pediatric Gastroenterology providers in Wisconsin received drug or device company payments?13 of 55 Pediatric Gastroenterology providers in Wisconsin (24%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
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.
Which hospitals do Pediatric Gastroenterologists in Wisconsin work at?According to CMS facility affiliation records, the Wisconsin hospitals where the most Pediatric Gastroenterologists hold privileges are Marshfield Medical Center in Marshfield.
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