Updated October 2026

Internists in Waukesha, WI

Internal medicine
Waukesha, Wisconsin

Internists: 61
Linked to a hospital or group: 56
Hospitals with an internist: 18
Medical groups with an internist: 18
Practice at a hospital: 48

There are 61 internists in Waukesha. Apogee Medical Group Waukesha, SC has the most, 21, and ProHealth Waukesha Memorial Hospital has the most affiliated internists, 47. 32% finished medical school 30 or more years ago.

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Waukesha internists, listed A to Z by last name

Each internist on the list has internal medicine as their primary specialty and a Waukesha practice address. The list shows the NPI, and how many hospitals and medical groups each one practices with. A free account names every hospital and group, with validated contacts.

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Waukesha internists, A to Z
Internist	Hospitals	Medical groups	Email and phone
Gerald N. Berman, MDNPI 1215909734	-	1 group	Contacts
Jonathan R. Bodager, MDNPI 1386006815	2 hospitals	1 group	Contacts
William J. Boehm, MDNPI 1346213519	2 hospitals	1 group	Contacts
Brenda L. Boschek, MDNPI 1154393833	2 hospitals	2 groups	Contacts
Jesus Casas, MDNPI 1902008196	3 hospitals	1 group	Contacts
James M. Chapman, MDNPI 1073586913	2 hospitals	1 group	Contacts
Daniel Cheng, MDNPI 1912970781	2 hospitals	1 group	Contacts
Wendy Cooper, MDNPI 1720051824	-	-	Contacts
William R. Cooper, MDNPI 1023078037	2 hospitals	2 groups	Contacts
Tyler Cunningham, MDNPI 1609307123	2 hospitals	1 group	Contacts
Omnia M Mohamed Saeed Abdelsalam Darweesh, MDNPI 1477105245	2 hospitals	1 group	Contacts
Reyhan Demircioglu, MDNPI 1215085857	2 hospitals	2 groups	Contacts
Thomas Joseph Dougherty, MDNPI 1487639902	-	1 group	Contacts
Linda F. Fikes, MDNPI 1407918865	1 hospital	-	Contacts
Kavisha D. Gandhi, MDNPI 1679137434	1 hospital	3 groups	Contacts
Naishalkumar B. Gandhi, MDNPI 1275880726	4 hospitals	5 groups	Contacts
Anil Kumar Garg, MDNPI 1003994583	-	-	Contacts
Jamey Jill Jick, MDNPI 1902985013	2 hospitals	1 group	Contacts
Martin William Kern, MDNPI 1215938758	-	1 group	Contacts
Binod Khadka, MDNPI 1265667430	1 hospital	1 group	Contacts
Kalpana M. Kumar, MDNPI 1235188681	1 hospital	-	Contacts
Jayaram KumaraswamyNPI 1487232179	1 hospital	1 group	Contacts
Francis J. Lee, DONPI 1073598322	3 hospitals	4 groups	Contacts
Adam Matthew Leidal, MDNPI 1063944676	2 hospitals	4 groups	Contacts
Michael A. Lenz, MDNPI 1609848167	3 hospitals	1 group	Contacts
Brett A. Linzer, MDNPI 1083686653	2 hospitals	2 groups	Contacts
Daniel Wong Lopez-Tan, MDNPI 1932156205	-	1 group	Contacts
William F. Lutz, MDNPI 1346237625	2 hospitals	2 groups	Contacts
Dean Luu, MDNPI 1124260542	2 hospitals	2 groups	Contacts
Sarita Makhija, MDNPI 1184697187	1 hospital	1 group	Contacts
Brad M. Malehorn, DONPI 1568671378	2 hospitals	2 groups	Contacts
Timothy Gerard McAvoy, MDNPI 1396792255	3 hospitals	2 groups	Contacts
Andrew J. McGown, MDNPI 1912954017	2 hospitals	4 groups	Contacts
Ann B. Merkow, MDNPI 1528035383	-	1 group	Contacts
Maryam Moeed, DONPI 1447831615	2 hospitals	1 group	Contacts
Biniyam Teka Mohammed, MDNPI 1649885005	2 hospitals	1 group	Contacts
Michael David Moths, MDNPI 1891227948	3 hospitals	1 group	Contacts
Debra A. Muggler, MDNPI 1942274055	3 hospitals	2 groups	Contacts
Andrew Ntabi, MDNPI 1578119137	2 hospitals	1 group	Contacts
Paul O'Neill, MDNPI 1821062225	2 hospitals	1 group	Contacts
Mekbib Gebrekidan Onkiso, MDNPI 1477013993	5 hospitals	9 groups	Contacts
Ana Perelman, MDNPI 1295936409	6 hospitals	4 groups	Contacts
Marcus T. Perry, MDNPI 1619056264	2 hospitals	2 groups	Contacts
Prachi Avinash Pophali, MDNPI 1689110611	3 hospitals	2 groups	Contacts
Jahanzeb Qureshi, MDNPI 1881121929	6 hospitals	6 groups	Contacts
Daniel J. Riordan, DONPI 1174545891	1 hospital	1 group	Contacts
Gagandeep Singh SandhuNPI 1265872857	2 hospitals	2 groups	Contacts
David D. Schlomer, MDNPI 1952373581	2 hospitals	2 groups	Contacts
Sarfraz Singh Sidhu, MDNPI 1801946462	5 hospitals	4 groups	Contacts
Adisalem Mulatu Teferi, MDNPI 1952032468	2 hospitals	1 group	Contacts

Showing 1 to 50 of 56 Waukesha internists

The list shows the 56 internists with a public profile. The other 5 are counted in the total and searchable with a free account.

Sources: NPPES NPI Registry (CMS) and Dmand AI Affiliation Data

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Apogee Medical Group Waukesha, SC has the most internists in Waukesha, with 21

ProHealth Medical Group is second with 19, and Froedtert & the Medical College of Wisconsin Community Physicians third with 7. Counts are internists with a Wisconsin address linked to each group.

Medical groups with the most internists in Waukesha
#	Medical group	Parent organization	Internists
1	Apogee Medical Group Waukesha, SCWaukesha	Parent on file	21
2	ProHealth Medical GroupWaukesha	Parent on file	19
3	Froedtert & the Medical College of Wisconsin Community PhysiciansMenomonee Falls	Parent on file	7
4	Ascension Columbia St. Mary's Hospital - Milwaukee CampusMilwaukee	Parent on file	7
5	Ascension Medical GroupGlendale	Parent on file	5
6	Froedtert & the Medical College of Wisconsin Community PhysiciansMilwaukee	Parent on file	4
7	Ascension Medical Group WI - Main Street - Family MedicineNeenah	Parent on file	3
8	Oak MedicalWaukesha	Parent on file	3
9	Oak Medical, SCWaukesha	Parent on file	3
10	Froedtert Northeast Medical GroupManitowoc	Parent on file	2

Top 10 of 18 Waukesha medical groups with an internist

Sources: Dmand AI Affiliation Data and Dmand AI Org Hierarchy Data

ProHealth Waukesha Memorial Hospital has the most affiliated internists in Waukesha, with 47

ProHealth Oconomowoc Memorial Hospital is second with 38, and Froedtert Hospital third with 6. Waukesha internists are affiliated with 18 hospitals in all.

Hospitals with the most internists in Waukesha
#	Hospital	Health system	Internists
1	ProHealth Waukesha Memorial HospitalWaukesha	ProHealth Care	47
2	ProHealth Oconomowoc Memorial HospitalOconomowoc	ProHealth Care	38
3	Froedtert HospitalMilwaukee	Froedtert ThedaCare Health	6
4	Ascension SE Wisconsin Hospital - St. JosephMilwaukee	Ascension	4
5	Ascension Columbia St. Mary's Hospital - Milwaukee CampusMilwaukee	Ascension	3
6	Rehabilitation Hospital of WisconsinWaukesha	ProHealth Care	3
7	Fort Memorial HospitalFort Atkinson	Fort HealthCare	2
8	Froedtert Menomonee Falls HospitalMenomonee Falls	Froedtert ThedaCare Health	2
9	SSM Health Monroe HospitalMonroe	SSM Health Care	1
10	Emplify Health Green Bay HospitalGreen Bay	Emplify Health	1

Top 10 of 18 Waukesha hospitals with an affiliated internistAll 3 Waukesha hospitals

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Source: Dmand AI Affiliation Data

Most Waukesha internists practice at a hospital: 48 of the 56 with a mapped site

32 also practice at a medical group site, and 19 at home health agencies. An internist can practice at several kinds of site, so the shares overlap.

Waukesha internists by site of care

Hospitals4886%
Medical group practices3257%
Home health agencies1934%
Hospices814%
Skilled nursing facilities59%

Sources: Dmand AI Affiliation Data and Dmand AI Practice Data

32% of Waukesha internists finished medical school 30 or more years ago

15 of the 47 Waukesha internists with a graduation year on file. 7 graduated in the last 10 years.

Physicians by years since medical school

Under 10 years ago715%
10 to 19 years ago1430%
20 to 29 years ago1123%
30 to 39 years ago1226%
40 or more years ago36%

Source: Dmand AI Professional Profile Data

Every Waukesha internist profile shows current hospitals and groups, Medicare activity and NPI details

Primary practiceThe main place they practice, with its type and cityOn every profile
Every site of careEach hospital, clinic and group where they practice nowWith a free account
EmployerThe organization they work for, when one is on fileWith a free account
Medicare servicesServices and procedure codes billed to Medicare, from CMSOn every profile
Medicare Part D prescribingClaims and drug costs from Part D, from CMSOn every profile
Industry paymentsPayments from drug and device makers, from CMS Open PaymentsOn every profile
Publications and clinical trialsResearch papers and trials linked to the NPI, when on fileOn every profile
Licenses and graduation yearState license numbers and medical school graduation yearOn every profile
NPI detailsNPI, enumeration date, primary taxonomy and practice addressOn every profile
Work email and mobile numberFound on request through healthcare waterfall enrichment, then validatedWith a free account
EHR in useThe EHR at each site where they practiceWith a free account
Colleagues at each siteThe clinicians they work with at each hospital and groupWith a free account

Free account: 30 days free, self-serve, no credit card.

Sources: NPPES NPI Registry (CMS), Medicare Physician & Other Practitioners (CMS), Open Payments (CMS) and Dmand AI Affiliation Data

Sources for the Waukesha internist directory

Sources for the data on this page
Data on this page	Source
HCPs, types and specialties	NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data
Sites of care, hospitals and medical groups	Dmand AI Affiliation Data
Medical school graduation year	Dmand AI Professional Profile Data

Data last refreshed October 2026Report an inaccuracy Remove my information

Internists are HCPs whose primary specialty is internal medicine (taxonomy code 207R00000X), with an active NPI and a Waukesha practice address.

FAQ

Frequently asked questions about internists in Waukesha

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

How many internists are in Waukesha?

61 internists have an active NPI, a Waukesha practice address and internal medicine (taxonomy code 207R00000X) as their primary specialty. 56 of them are linked to a hospital or medical group.

Which Waukesha medical groups have the most internists?

Apogee Medical Group Waukesha, SC, with 21, followed by ProHealth Medical Group with 19 and Froedtert & the Medical College of Wisconsin Community Physicians with 7.

Which Waukesha hospitals have the most internists?

ProHealth Waukesha Memorial Hospital, with 47 affiliated internists, followed by ProHealth Oconomowoc Memorial Hospital with 38 and Froedtert Hospital with 6.

What share of Waukesha internists practice at a hospital?

48 of the 56 Waukesha internists with a mapped site of care, or 86%, have a current hospital affiliation.

What is the taxonomy code for internal medicine?

207R00000X is the NPPES taxonomy code for internal medicine. Sub-specialties with their own code are counted on their own lists.

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