Internal Medicine Doctors in Wisconsin
Data updated monthly · Last refresh October 2026
2,081 Internal Medicine providers practice in Wisconsin, including 377 (18%) offering telehealth. The largest concentration is in Madison. 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.
2,081providers
377telehealth
Madisontop city
Internal Medicine by city in Wisconsin
Choose a city to see providers there.
Internal Medicine 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. Paul John Hayner, MDMadison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 274-1100 Dr. Paul Shattuck, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 280-7059 Dr. Peggy Simpson, MDMadison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 252-8000 Dr. Peter Idsvoog, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 828-7611 Dr. Peter Kleinschmidt, M.D.Madison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 263-7500 Dr. Peter Newcomer, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 265-1600 Dr. Peter Stadmeyer, M.D.Madison, WI · $131 in drug and device payments (2025) · Telehealth ·
(608) 890-5000 Dr. Philip Cohen, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 441-2512 Dr. Philip Zimmermann, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 236-4284 Dr. Puangpetch ChanbusarakumMadison, WI · No drug or device payments recorded (2025) ·
(608) 267-1445 Dr. Rachel Wilson, D.O.Madison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 263-7500 Dr. Rafael Hastey, M.D.Madison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 824-4470 Dr. Randall Haas, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 824-4800 Dr. Randy Heidel, MDMadison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 287-2250 Dr. Rani Saoud, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 417-5695 Dr. Raphael Tadeu Do Vale Souza, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Raul Ocampo Landa, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Ray Kimura, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 417-5695 Dr. Rebecca Byers, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 265-5600 Dr. Rebecca LuohMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Rebecca Strigenz, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 251-6100 Dr. Ricardo Almonte, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 807-1600 Dr. Richard Armstrong, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 260-6000 Dr. Richard Chiu, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Richard Day, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 287-2435 Dr. Richard Dewitt, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 238-2750 Dr. Richard Granger, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Richard Welnick, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 287-2884 Dr. Riley Madigan, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Ritwick Mynam, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Riya ParikhMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Robert Agarwal, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 287-2250 Dr. Robert Alt, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 260-6000 Dr. Robert Boyle, MDMadison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 274-1100 Dr. Robert Gilbert, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 260-6000 Dr. Robert Olson, M.D.Madison, WI · $285 in drug and device payments (2025) ·
(608) 233-9746 Dr. Ross TanisMadison, WI · $2,531 in drug and device payments (2025) ·
(803) 727-5117 Dr. R. Slater, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 417-6000 Dr. Ryan IngebritsenMadison, WI · $239 in drug and device payments (2025) ·
(608) 263-6400 Dr. Ryan MarshMadison, WI · No drug or device payments recorded (2025) ·
(608) 256-1901 Dr. Rylee Doucette, MD, MPHMadison, WI · No drug or device payments recorded (2025) ·
(608) 262-6400 Dr. Sabina Agrawal, D.O.Madison, WI · No drug or device payments recorded (2025) ·
(608) 263-0571 Dr. Sacha Thomas, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 251-6100 Dr. Safa Shiari, M.D.Madison, WI · No drug or device payments recorded (2025) ·
(608) 284-8299 Dr. Saher Ashraf, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Saif-eldin Farag, DOMadison, WI · No drug or device payments recorded (2025) ·
(608) 417-5695 Dr. Samantha Williams, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Samuel BodermanMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Samuel Trump, MDMadison, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 265-1200 Conditions Internal Medicine providers in Wisconsin 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.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
Common questions
How many Internal Medicine providers are in Wisconsin?There are 2,081 Internal Medicine providers with active NPI records practicing in Wisconsin, according to federal NPPES data refreshed monthly.
Do Internal Medicine providers in Wisconsin offer telehealth?Yes. 377 of the 2,081 Internal Medicine providers in Wisconsin (about 18%) report offering telehealth services in CMS data.
Which cities in Wisconsin have the most Internal Medicine providers?Madison (411), Milwaukee (383), La Crosse (113) have the highest concentration of Internal Medicine providers in Wisconsin.
How many Internal Medicine providers in Wisconsin received drug or device company payments?350 of 2,081 Internal Medicine providers in Wisconsin (17%) 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 Wisconsin treat?Internal Medicine providers 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 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 Internal Medicine Doctors in Wisconsin work in independent practices or large health systems?Among 984 Internal Medicine Doctors in Wisconsin enrolled in Medicare, 4% bill through a solo or small practice with fewer than 10 clinicians, 11% through a mid-size group of 10 to 99, and 85% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Internal Medicine Doctors in Wisconsin work at?According to CMS facility affiliation records, the Wisconsin hospitals where the most Internal Medicine Doctors hold privileges are University of Wi Hospitals & Clinics Authority in Madison; Froedtert Memorial Lutheran Hospital in Milwaukee; Aurora St Lukes Medical Center in Milwaukee.
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