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Internal Medicine - Infectious Diseases in Madison, WI

Browse 53 Internal Medicine - Infectious Disease providers listed in NPPES with a practice address in Madison, Wisconsin.

53 Healthcare Providers

How Madison compares with the U.S.

Madison has 19 clinicians in Internal Medicine - Infectious Disease per 100,000 residents, 5.9 times the U.S. rate of 3.2.

That is 53 active clinicians in Internal Medicine - Infectious Disease with a practice address in Madison, for a population of 278,001.

The Wisconsin rate is 2.9 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

98% of clinicians in Internal Medicine - Infectious Disease in Madison listed in the CMS Medicare file (40 of 41) accept Medicare assignment. That is similar to the Wisconsin share of 98%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

71% of clinicians in Internal Medicine - Infectious Disease in Madison listed in the CMS Medicare file (29 of 41) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the Wisconsin share of 68%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine - Infectious Disease Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Infectious Disease practitioners in Madison, WI

Source: CMS PECOS
PECOS Enrolled Specialists 45 In Madison, WI
Part B Lab & Imaging Eligible 45 Diagnostic Referrals
DME Ordering Eligible 45 Durable Medical Equipment
Home Health Agency Referrals 45 HHA Ordering Eligible
Showing 1โ€“20 of 53 providers
With recent CMS data first, then Aโ€“Z

Dr. David R Andes , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 53792
Phone: 6082630943
NPI Identifier 1154398857
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Dr. Rosemary Catherine Bailey , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment
303 N Hamilton St Apt 219, Madison, WI 537035307
Phone: 3399277668
NPI Identifier 1497218796
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Dr. Meghan B. Brennan , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537920001
Phone: 6082630946
NPI Identifier 1033154356
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Dr. Amanda S Carlson , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1211 Fish Hatchery Rd, Madison, WI 537151909
Phone: 6082528000
NPI Identifier 1164628574
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Dr. John Cherian , MD

Internal Medicine - Infectious Disease

Active NPI Status
2500 Overlook Ter, Madison, WI 537052254
Phone: 6082561901
NPI Identifier 1235625492
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Dr. Kenneth Christian , MD

Internal Medicine - Infectious Disease

Active NPI Status
600 Highland Ave, Madison, WI 537920001
Phone: 6082630572
NPI Identifier 1780387746
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Dr. Christopher J Crnich , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 53792
Phone: 6082630943
NPI Identifier 1740257419
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Dr. Roshni Culas , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment
531 W Washington Ave, Madison, WI 537032953
Phone: 5189121448
NPI Identifier 1861907156
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Dr. Gregory M Gauthier , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537920001
Phone: 6082630943
NPI Identifier 1194787754
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Kevin Sellery Gregg

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537920001
Phone: 6082630946
NPI Identifier 1013105220
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Ambar Haleem , MB, BS

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537920001
Phone: 6082630946
NPI Identifier 1104035864
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Dr. Garry Jean-Louis , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1211 Fish Hatchery Rd, Madison, WI 537151909
Phone: 6082528000
NPI Identifier 1538106828
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Dr. Eric Christian Johannsen , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment
600 Highland Ave, Madison, WI 537920001
Phone: 6082630946
NPI Identifier 1437115680
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Dr. Rebecca Rose Kemnitz , MD

Internal Medicine - Infectious Disease

Active NPI Status
600 Highland Ave, Madison, WI 537929067
Phone: 6082630572
NPI Identifier 1982108122
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Dr. Michael Anton Kessler , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537923721
Phone: 6082630946
NPI Identifier 1396132619
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Dr. Shravan Kethireddy , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment
University Of Wisconsin Hospital And Clinics, 600 Highland Ave, Madison, WI 537920001
Phone: 6082632675
NPI Identifier 1982768677
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Dr. Benjamin Grant Ladner , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537922133
Phone: 6082630946
NPI Identifier 1073975728
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Dr. Swapnil Sunil Lanjewar , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537920001
Phone: 6082630946
NPI Identifier 1003170671
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Dr. Mikyung Lee , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
600 Highland Ave, Madison, WI 537925204
Phone: 6082630946
NPI Identifier 1538239819
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Dr. Alexander J. Lepak , MD

Internal Medicine - Infectious Disease

Active NPI Status Accepts Medicare Assignment
600 Highland Ave, University Of Wisconsin Hospital And Clinics, Madison, WI 537923284
Phone: 6082631545
NPI Identifier 1265490536
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Frequently Asked Questions about Internal Medicine - Infectious Disease in Madison

How do I check a Internal Medicine - Infectious Disease practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Wisconsin licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.