Independent US Healthcare Provider Directory & Public Medical Database Patient Guides
Medical Specialty Listing

Internal Medicine Providers in Oshkosh, WI

Browse 25 Internal Medicine providers listed in NPPES with a practice address in Oshkosh, Wisconsin.

25 Healthcare Providers

How Oshkosh compares with the U.S.

Oshkosh has 37 clinicians in Internal Medicine per 100,000 residents, 16% lower than the U.S. rate of 44.

That is 25 active clinicians in Internal Medicine with a practice address in Oshkosh, for a population of 66,729.

That is close to the Wisconsin rate of 35.

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.

100% of clinicians in Internal Medicine in Oshkosh listed in the CMS Medicare file (11 of 11) accept Medicare assignment. That is higher than the Wisconsin share of 94%.

Only 11 of 25 active clinicians in Internal Medicine in Oshkosh 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.

45% of clinicians in Internal Medicine in Oshkosh listed in the CMS Medicare file (5 of 11) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than 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 Oshkosh, WI

Source: CMS PECOS
PECOS Enrolled Specialists 17 In Oshkosh, WI
Part B Lab & Imaging Eligible 17 Diagnostic Referrals
DME Ordering Eligible 18 Durable Medical Equipment
Home Health Agency Referrals 17 HHA Ordering Eligible
Showing 1โ€“20 of 25 providers
With recent CMS data first, then Aโ€“Z

Dr. Ammar Alzoubi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
855 N Westhaven Dr, Oshkosh, WI 54904
Phone: 9203038700
NPI Identifier 1598773152
View Full Profile

Dr. Lisa R Anthony , MD

Internal Medicine

Active NPI Status
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1659346773
View Full Profile

Dr. Mark Cockley , MD

Internal Medicine

Active NPI Status
600 N Westhaven Dr, Oshkosh, WI 549046926
Phone: 9022375000
NPI Identifier 1669456422
View Full Profile

Dr. Benjamin Joseph Heinzen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1855 S Koeller St, Oshkosh, WI 549026214
Phone: 9202237100
NPI Identifier 1083886733
View Full Profile

Isna Khan

Internal Medicine

Active NPI Status Accepts Medicare Assignment
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1316432529
View Full Profile

Dr. Matthew N Kraemer , DO

Internal Medicine

Active NPI Status
1855 S Koeller St, Oshkosh, WI 549026186
Phone: 9202237100
NPI Identifier 1972598332
View Full Profile

Dr. Teresa H Lee , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1700871209
View Full Profile

Dr. Joseph D Mccausland , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1558416644
View Full Profile

Dr. Ahmed U Otokiti , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1760867204
View Full Profile

Dr. Curtis D Radford , MD

Internal Medicine

Active NPI Status
2725 Jackson St, Oshkosh, WI 549011513
Phone: 9202237600
NPI Identifier 1932194248
View Full Profile

Dr. Weston William Radford , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1855 S Koeller St, Oshkosh, WI 549026186
Phone: 9202237100
NPI Identifier 1700229416
View Full Profile

Dr. Kirtida N Ringwala , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
10 E Irving Ave, Oshkosh, WI 54901
Phone: 9202363214
NPI Identifier 1356376966
View Full Profile

Dr. Natalie A Roberts , DO

Internal Medicine

Active NPI Status
500 S Oakwood Rd, Oshkosh, WI 549047944
Phone: 9202230275
NPI Identifier 1740231174
View Full Profile

Dr. Asma Sabih , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
855 N Westhaven Dr, Oshkosh, WI 54904
Phone: 9204566000
NPI Identifier 1891802161
View Full Profile

Dr. Hendrik Schultz , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1649212861
View Full Profile

Dr. John D Steiner , MD

Internal Medicine

Active NPI Status
3151 Eden Ct, Oshkosh, WI 549046639
Phone: 9206514000
NPI Identifier 1326155540
View Full Profile

Dr. Lars V Swanson , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
2700 W 9th Ave Ste 203, Oshkosh, WI 549047864
Phone: 9207382000
NPI Identifier 1457346686
View Full Profile

Dr. Michael A Duffy , MD

Internal Medicine

Active NPI Status
855 N Westhaven Dr, Oshkosh, WI 549047668
Phone: 9203038700
NPI Identifier 1922113182
View Full Profile

Dr. Richard Charles Hughes , MD

Internal Medicine

Active NPI Status
2959 Ryf Rd, Oshkosh, WI 549049576
Phone: 9202332865
NPI Identifier 1730324120
View Full Profile

Dr. Lois Jean Jacobs , MD, PhD

Internal Medicine

Active NPI Status
1510 Arboretum Dr, Oshkosh, WI 549012790
Phone: 9202315313
NPI Identifier 1306843321
View Full Profile

Frequently Asked Questions about Internal Medicine in Oshkosh

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.