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Internal Medicine Providers in Marshfield, WI

Browse 62 Internal Medicine providers listed in NPPES with a practice address in Marshfield, Wisconsin.

62 Healthcare Providers

How Marshfield compares with the U.S.

Marshfield has 332 clinicians in Internal Medicine per 100,000 residents, 7.5 times the U.S. rate of 44.

That is 62 active clinicians in Internal Medicine with a practice address in Marshfield, for a population of 18,700.

The Wisconsin rate is 35 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.

100% of clinicians in Internal Medicine in Marshfield listed in the CMS Medicare file (24 of 24) accept Medicare assignment. That is higher than the Wisconsin share of 94%.

Only 24 of 62 active clinicians in Internal Medicine in Marshfield appear in the CMS Medicare file, so this share describes that smaller group.

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.

38% of clinicians in Internal Medicine in Marshfield listed in the CMS Medicare file (9 of 24) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the Wisconsin share of 35%.

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 Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Marshfield, WI

Source: CMS PECOS
PECOS Enrolled Specialists 37 In Marshfield, WI
Part B Lab & Imaging Eligible 38 Diagnostic Referrals
DME Ordering Eligible 38 Durable Medical Equipment
Home Health Agency Referrals 38 HHA Ordering Eligible
Showing 1โ€“20 of 62 providers
With recent CMS data first, then Aโ€“Z

Dr. Sheetal Aatrai , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 6146803352
NPI Identifier 1417568965
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Dr. Christopher J Adler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 8007828581
NPI Identifier 1891217741
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Dr. Tekabe N Birhane , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875511
NPI Identifier 1376170605
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Dr. Lee B Cody , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1000 N Oak Ave, Marshfield, WI 54449
Phone: 7153875511
NPI Identifier 1255431193
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Dr. Linda Daly-Oneill , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495777
Phone: 7153875782
NPI Identifier 1366550386
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Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875240
NPI Identifier 1235740838
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Dr. Jonathon A Forncrook , DO

Internal Medicine

Active NPI Status
1000 N Oak Ave, 1f2, Marshfield, WI 544496733
Phone: 7153893141
NPI Identifier 1780784629
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Dr. Marian Greenburg , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495777
Phone: 7153893334
NPI Identifier 1720198872
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Eammon Grosek

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7196490232
NPI Identifier 1154855732
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Dr. Gaojun Gui , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1000 N Oak Ave, Marshfield, WI 54449
Phone: 7153875537
NPI Identifier 1568570828
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Dr. Muhammad Shahid Haleem , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875755
NPI Identifier 1275544546
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Dr. Analise Jamaica Hanneman , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N. Oak Ave., Marshfield Clinic, Marshfield, WI 54449
Phone: 7153875600
NPI Identifier 1386027910
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Dr. Frederick B Hernaez , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875511
NPI Identifier 1205498227
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Dr. Renee Ann Hoynacke , MD

Internal Medicine

Active NPI Status
1000 N Oak Ave, Marshfield, WI 544495777
Phone: 7153875782
NPI Identifier 1821106832
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Dr. Nirpeksh Jain , MD

Internal Medicine

Active NPI Status
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875501
NPI Identifier 1649794603
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Dr. Matthew Jansen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 54449
Phone: 7153875435
NPI Identifier 1255441408
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Dr. Jian P. Khamo-Soskos , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875511
NPI Identifier 1184814378
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Dr. Rana Raheel Hafeez Khan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875511
NPI Identifier 1336555390
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Dr. Roderick D. Koehler , MD

Internal Medicine

Active NPI Status
1000 N Oak Ave, Marshfield, WI 544495703
Phone: 7153875511
NPI Identifier 1962502617
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Dr. Ewa Kubica , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 N Oak Ave, Marshfield, WI 544495777
Phone: 7153875435
NPI Identifier 1942318951
View Full Profile

Frequently Asked Questions about Internal Medicine in Marshfield

How do I check a Internal Medicine 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.