Sleep Medicine Doctors (Internal Medicine) in Wisconsin
Data updated monthly · Last refresh October 2026
27 Sleep Medicine (Internal Medicine) providers practice in Wisconsin, including 9 (33%) offering telehealth. The largest concentration is in Fitchburg. 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.
27providers
9telehealth
Fitchburgtop city
Sleep Medicine (Internal Medicine) by city in Wisconsin
Choose a city to see providers there.
Where Sleep Medicine Doctors (Internal Medicine) in Wisconsin practice
From CMS Medicare enrollment records covering 16 of the 27 providers listed here (59%). Providers who do not bill Medicare are not included in these figures.
13%solo or small practice (under 10 clinicians)
0%mid-size group (10 to 99)
88%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Sleep Medicine Doctors (Internal Medicine) | All clinicians in group | Main city |
| Dean Health Systems Inc. | 4 | 1,174 | Fitchburg |
| Aurora Medical Group, Inc.. | 2 | 3,764 | Green Bay |
| University of Wisconsin Medical Foundation Inc. | 2 | 2,537 | Madison |
| Gundersen Lutheran Medical Center Inc. | 2 | 888 | La Crosse |
| Gundersen Clinic LTD | 2 | 422 | Tomah |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Sleep Medicine Doctors (Internal Medicine) affiliated |
| Gundersen Boscobel Area Hospital and Clinics | Boscobel | Nonprofit | Not rated | 2 |
| Ssm Health St Mary's Hospital - Madison | Madison | Nonprofit | 4 of 5 | 2 |
| Reedsburg Area Medical Center | Reedsburg | Nonprofit | 5 of 5 | 2 |
| Ascension Columbia St Marys Hospital Milwaukee | Milwaukee | Nonprofit | 3 of 5 | 2 |
| Aurora Baycare Medical Ctr | Green Bay | For-profit | 4 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.
Sleep Medicine (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. Nazi Khan, MDColumbus, WI · $85 in drug and device payments (2025) · Telehealth ·
(920) 623-5226 Dr. Don Harden, MDFitchburg, WI · No drug or device payments recorded (2025) ·
(608) 229-7979 Dr. Ewa Alexander, MDFitchburg, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 229-7979 Dr. Harrison Gimbel, MDFitchburg, WI · $16 in drug and device payments (2025) · Telehealth ·
(608) 229-7979 Dr. Jacalyn Nelson, MDFitchburg, WI · No drug or device payments recorded (2025) ·
(608) 229-7979 Dr. Joseph Crisalli, M.D.Fitchburg, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 229-7979 Dr. Scott Johnson, M.D.Fitchburg, WI · No drug or device payments recorded (2025) ·
(608) 229-7979 Dr. William Donovan, MDFitchburg, WI · No drug or device payments recorded (2025) ·
(608) 229-7979 Dr. Kabir Ahmed, M.D.Fond Du Lac, WI · $50 in drug and device payments (2025) ·
(920) 926-5020 Dr. Amit Gupta, M.D.Green Bay, WI · No drug or device payments recorded (2025) · Telehealth ·
(920) 288-5656 Dr. Deane Franso, M.D.Green Bay, WI · No drug or device payments recorded (2025) ·
(920) 433-7451 Dr. Ethan Emmons, MDGreen Bay, WI · No drug or device payments recorded (2025) ·
(920) 433-7451 Dr. James Gapinski, MDGreen Bay, WI · No drug or device payments recorded (2025) ·
(920) 288-8100 Dr. Jason Rakita, MDJanesville, WI · No drug or device payments recorded (2025) ·
(608) 371-8000 Dr. Joshua Fehl, MDJanesville, WI · No drug or device payments recorded (2025) ·
(608) 756-5555 Dr. Rajesh Balagani, DOJanesville, WI · $137 in drug and device payments (2025) · Telehealth ·
(608) 371-8000 Dr. Alexander Villareal, M.D.La Crosse, WI · No drug or device payments recorded (2025) · Telehealth ·
(608) 782-7300 Dr. Allen Foster, MDLa Crosse, WI · $26 in drug and device payments (2025) · Telehealth ·
(608) 782-7300 Dr. Daren Tobert, MDLa Crosse, WI · No drug or device payments recorded (2025) ·
(608) 782-7300 Dr. Kenneth Casey, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 232-3333 Dr. Mary Klink, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 267-5950 Dr. Medhavani Chandra, MD Dr. Quinn Bongers, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 263-6400 Dr. Shane Creado, M.D.Madison, WI · $102 in drug and device payments (2025) ·
(608) 238-9354 Dr. Steven Barczi, MDMadison, WI · No drug or device payments recorded (2025) ·
(608) 829-5201 Dr. Dakota Vaughan, MDMilwaukee, WI · $352 in drug and device payments (2025) ·
(414) 955-0437 Dr. Nouraddin Nouraddin, MD, FACPWauwatosa, WI · $16 in drug and device payments (2025) · Telehealth ·
(262) 785-2222 Common questions
How many Sleep Medicine (Internal Medicine) providers are in Wisconsin?There are 27 Sleep Medicine (Internal Medicine) providers with active NPI records practicing in Wisconsin, according to federal NPPES data refreshed monthly.
Do Sleep Medicine (Internal Medicine) providers in Wisconsin offer telehealth?Yes. 9 of the 27 Sleep Medicine (Internal Medicine) providers in Wisconsin (about 33%) report offering telehealth services in CMS data.
Which cities in Wisconsin have the most Sleep Medicine (Internal Medicine) providers?Fitchburg (7), Madison (6), Green Bay (4) have the highest concentration of Sleep Medicine (Internal Medicine) providers in Wisconsin.
How many Sleep Medicine (Internal Medicine) providers in Wisconsin received drug or device company payments?9 of 27 Sleep Medicine (Internal Medicine) providers in Wisconsin (33%) 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.
Do most Sleep Medicine Doctors (Internal Medicine) in Wisconsin work in independent practices or large health systems?Among 16 Sleep Medicine Doctors (Internal Medicine) in Wisconsin enrolled in Medicare, 13% bill through a solo or small practice with fewer than 10 clinicians, 0% through a mid-size group of 10 to 99, and 88% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Sleep Medicine Doctors (Internal Medicine) in Wisconsin work at?According to CMS facility affiliation records, the Wisconsin hospitals where the most Sleep Medicine Doctors (Internal Medicine) hold privileges are Gundersen Boscobel Area Hospital and Clinics in Boscobel; Ssm Health St Mary's Hospital - Madison in Madison; Reedsburg Area Medical Center in Reedsburg.
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