Updated October 2026

Medical groups in Wisconsin

Medical group directory
Wisconsin

Medical groups: 1,501
Multi-specialty: 250
Single-specialty: 1,251
More than one site: 771
100+ physicians: 59

There are 1,501 medical groups in Wisconsin with a Medicare PAC ID. Aurora Medical Group is the largest, with 2,410 Wisconsin physicians. Froedtert ThedaCare Health has the most physicians across its groups, 3,118, and 72% of Wisconsin groups are independent.

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Aurora Medical Group is the largest medical group in Wisconsin, with 2,410 physicians

Ranked by physicians with a Wisconsin address linked to each group. Froedtert & the Medical College of Wisconsin Community Physicians is second with 2,131, and UW Health third with 2,054. 59 Wisconsin groups have 100 or more physicians.

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Medical groups in Wisconsin, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	Aurora Medical GroupMilwaukee · 295 sites	Parent on file	2,410	4,843	Decision makers
2	Froedtert & the Medical College of Wisconsin Community PhysiciansMilwaukee · 144 sites	Parent on file	2,131	3,701	Decision makers
3	UW HealthMiddleton · 159 sites	Parent on file	2,054	3,341	Decision makers
4	Froedtert & the Medical College of Wisconsin Community PhysiciansMenomonee Falls · 122 sites	Parent on file	1,165	2,126	Decision makers
5	Marshfield Clinic Health SystemMarshfield · 167 sites	Parent on file	960	1,932	Decision makers
6	Marshfield Clinic Health System (MCHS), Marshfield Medical CenterMarshfield · 105 sites	Parent on file	918	1,874	Decision makers
7	Aurora Advanced HealthcareMilwaukee · 102 sites	Parent on file	888	1,830	Decision makers
8	SSM Health Dean Medical GroupMadison · 86 sites	Parent on file	763	1,447	Decision makers
9	Gundersen Lutheran Medical CenterLa Crosse · 42 sites	Parent on file	697	1,393	Decision makers
10	Ascension Medical GroupGlendale · 151 sites	Parent on file	618	1,161	Decision makers
11	Lakeview Medical CenterRice Lake · 56 sites	Parent on file	563	1,191	Decision makers
12	Mayo Clinic Health System in Eau ClaireEau Claire · 37 sites	Parent on file	510	1,090	Decision makers
13	MercyhealthJanesville · 69 sites	Parent on file	501	858	Decision makers
14	Ascension Columbia St. Mary's Hospital - Milwaukee CampusMilwaukee · 73 sites	Parent on file	491	737	Decision makers
15	Lakeshore Medical ClinicSaint Francis · 89 sites	Parent on file	489	1,046	Decision makers
16	Gundersen Health SystemLa Crosse · 92 sites	Parent on file	481	930	Decision makers
17	Marshfield Medical Center - NeillsvilleNeillsville · 47 sites	Parent on file	468	1,044	Decision makers
18	Marshfield Medical Center-Beaver DamBeaver Dam · 14 sites	Parent on file	461	1,037	Decision makers
19	ThedaCare Behavioral Health Walk-in Care-NeenahNeenah · 101 sites	Parent on file	445	957	Decision makers
20	Mayo Clinic Health System in La CrosseLa Crosse · 39 sites	Parent on file	416	710	Decision makers
21	Marshfield Medical Center-Park FallsPark Falls · 48 sites	Parent on file	412	955	Decision makers
22	Prevea HealthGreen Bay · 50 sites	-	366	825	Decision makers
23	Prevea HealthSheboygan · 15 sites	-	293	674	Decision makers
24	Children's Specialty GroupMilwaukee · 10 sites	Parent on file	290	418	Decision makers
25	SSM Health St. Agnes Hospital - Fond du LacFond Du Lac · 31 sites	Parent on file	266	541	Decision makers
26	ProHealth Medical GroupWaukesha · 59 sites	Parent on file	252	586	Decision makers
27	Aurora BayCare Medical CenterGreen Bay · 20 sites	Parent on file	232	400	Decision makers
28	Ascension Medical Group WI - Main Street - Family MedicineNeenah · 54 sites	Parent on file	225	415	Decision makers
29	Group Health Cooperative of South Central WisconsinMadison · 29 sites	Parent on file	223	401	Decision makers
30	Gundersen Boscobel Area Hospital and ClinicsBoscobel · 13 sites	Parent on file	212	258	Decision makers
31	Fort HealthCareFort Atkinson · 20 sites	Parent on file	201	312	Decision makers
32	Gundersen Moundview Hospital & ClinicsFriendship · 2 sites	Parent on file	197	250	Decision makers
33	Forefront DermatologyManitowoc · 328 sites	Parent on file	195	401	Decision makers
34	Gundersen St. Joseph's Hillsboro ClinicHillsboro · 12 sites	Parent on file	190	264	Decision makers
35	Gundersen Tri-County Hospital and ClinicsWhitehall · 7 sites	Parent on file	189	271	Decision makers
36	Waisman Center TIES ClinicMadison · 18 sites	Parent on file	177	203	Decision makers
37	Aurora St. Luke's Medical CenterMilwaukee · 41 sites	Parent on file	173	367	Decision makers
38	SSM Health Monroe Clinic Medical GroupMonroe · 16 sites	Parent on file	167	267	Decision makers
39	Bellin Health Oconto HospitalOconto · 18 sites	Parent on file	165	559	Decision makers
40	Emergency Medicine Specialists, S.C.Wauwatosa · 38 sites	Parent on file	157	305	Decision makers
41	Froedtert Northeast Medical GroupManitowoc · 20 sites	Parent on file	157	251	Decision makers
42	CORA Physical Therapy - BurlingtonBurlington · 56 sites	Parent on file	156	253	Decision makers
43	Prevea HealthGreen Bay · 33 sites	-	149	375	Decision makers
44	Tomah HealthTomah · 4 sites	Parent on file	140	197	Decision makers
45	Black River HealthBlack River Falls · 8 sites	Parent on file	140	196	Decision makers
46	The Richland Hospital and ClinicsRichland Center · 3 sites	Parent on file	139	175	Decision makers
47	BayCare ClinicGreen Bay · 40 sites	-	136	317	Decision makers
48	Reedsburg Area Medical CenterReedsburg · 5 sites	Parent on file	136	233	Decision makers
49	Aspirus Medford Hospital and ClinicsMedford · 13 sites	Parent on file	132	273	Decision makers
50	UnityPoint Health, MeriterMadison · 24 sites	Parent on file	121	320	Decision makers

Showing 1 to 10 of 1,501 medical groups in Wisconsin

Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data

Froedtert ThedaCare Health has the most physicians in Wisconsin medical groups, with 3,118 across 15 groups

Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 45 parent organizations have two or more Wisconsin medical groups. Among health systems, Advocate Health has the most groups, 17. Each clinician counts once per parent organization.

Parent organizations with the most Wisconsin medical groups
#	Parent organization	Wisconsin groups	Physicians	HCPs
1	Froedtert ThedaCare HealthHealth system	15	3,118	6,044
2	Advocate HealthHealth system	17	2,794	5,709
3	University of Wisconsin Hospitals and Clinics AuthorityHealth system	2	2,056	3,344
4	Ascension Health AllianceHealth system	12	1,203	2,163
5	SSM Health CareHealth system	5	1,121	2,142
6	Sanford HealthHealth system	6	1,040	2,088
7	Emplify HealthHealth system	11	1,024	2,323
8	AspirusHealth system	4	751	1,569
9	Mayo ClinicAcademic health system	2	733	1,538
10	Children's Hospital and Health SystemHealth system	3	297	430

Top 10 of 45 parent organizations with two or more Wisconsin groups

Froedtert ThedaCare HealthHealth system · 15 Wisconsin medical groups
Froedtert & the Medical College of Wisconsin Community PhysiciansMulti-specialty group · Milwaukee
Froedtert & the Medical College of Wisconsin Community PhysiciansMulti-specialty group · Menomonee Falls
13 more Wisconsin groups and their practice sites

See every medical group, site and clinician under Froedtert ThedaCare Health

Org Hierarchy Explorer maps every group, site of care and clinician under the parent, with the leaders at each group.

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Source: Dmand AI Org Hierarchy Data

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Dmand AI maps the owners, administrators and physician leaders at each of the 1,501 Wisconsin medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.

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72% of Wisconsin medical groups are independent, with no larger parent organization

A group counts as independent when no health system, platform or other organization sits above it in the org hierarchy. Every other group belongs to a larger organization.

Wisconsin medical groups by ownership

Independent1,08472%
Health system or hospital1369%
Platform or corporate owner1117%
Community or government1127%
Other organization584%

Source: Dmand AI Org Hierarchy Data

262 Wisconsin medical groups practice at a hospital site

Beyond their own offices, groups practice at the sites of care linked to them in the org hierarchy. A group can practice at several kinds of site, so the shares overlap.

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

Behavioral and mental health groups are the most common medical groups in Wisconsin, with 387

Each group is counted once, under its main specialty. Chiropractic groups are second, with 365, and 250 Wisconsin groups are multi-specialty.

Source: Dmand AI Professional Profile Data

38,669 Wisconsin HCPs work in Wisconsin medical groups, 15,805 of them physicians

Each clinician is counted once, across every Wisconsin group they are linked to. Only clinicians with a Wisconsin address are counted.

HCPs in Wisconsin medical groups by type

Physicians (MD, DO)15,80541%
Nurses and nurse practitioners7,34419%
Behavioral health clinicians5,19413%
Physician assistants3,88110%
Therapists (PT and OT)3,1788%
Other HCPs3,2678%

Source: Dmand AI Affiliation Data

Milwaukee has the most medical groups in Wisconsin, with 134

134medical groups in Milwaukee 97medical groups in Madison 64medical groups in Appleton 60medical groups in Green Bay 47medical groups in Waukesha 41medical groups in Brookfield

More Wisconsin cities with medical groups

Source: Doctors and Clinicians National Downloadable File (CMS)

Each Wisconsin medical group profile shows the parent, sites, clinicians and identifiers

Clinicians and specialtiesA count by specialty and a sample of the group's cliniciansOn every profile
Practice locationsMain site and a sample of practice locations, with a count of the restOn every profile
Medicare Part B paymentsMedicare payments to the group, from CMSOn every profile
Group NPI and Medicare PAC IDIdentifiers for matching records across sourcesOn every profile
Parent organizationThe health system, platform or owner above the groupOn every profile
Every clinician and siteThe full roster and every practice locationWith a free account
Leader and clinician contactsWork emails and mobile numbers, found on request and then validatedWith a free account
EHR used by the group's cliniciansThe EHR in use at the group's sitesWith a free account

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

Sources: Doctors and Clinicians National Downloadable File (CMS), Medicare Physician & Other Practitioners (CMS) and Dmand AI Org Hierarchy Data

Sources for the Wisconsin medical group directory

Sources for the data on this page
Data on this page	Source
Medical groups, specialties and sites	Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Professional Profile Data
Parent organizations and independence	Dmand AI Org Hierarchy Data
Physicians and HCPs	Dmand AI Affiliation Data
Group NPI and PAC ID	NPPES NPI Registry (CMS) and Doctors and Clinicians National Downloadable File (CMS)

Data last refreshed October 2026Report an inaccuracy Remove my information

The directory lists groups with a Medicare PAC ID.

FAQ

Frequently asked questions about medical groups in Wisconsin

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

How many medical groups are in Wisconsin?

There are 1,501 medical groups in Wisconsin with a Medicare PAC ID: 250 multi-specialty and 1,251 single-specialty.

What is the largest medical group in Wisconsin?

Aurora Medical Group in Milwaukee, with 2,410 physicians and 4,843 HCPs with a Wisconsin address. Froedtert & the Medical College of Wisconsin Community Physicians is second with 2,131, and UW Health is third with 2,054.

Which health system has the most medical groups in Wisconsin?

By physicians, Froedtert ThedaCare Health, with 3,118 across 15 groups, followed by Advocate Health with 2,794 and University of Wisconsin Hospitals and Clinics Authority with 2,056.

How many Wisconsin medical groups are independent?

1,084, or 72%, have no larger parent organization in the Dmand AI org hierarchy. 136 belong to a health system or hospital and 111 to a physician platform or corporate owner.

How many Wisconsin medical groups practice at a hospital?

262 Wisconsin groups practice at a hospital site linked to them in the Dmand AI org hierarchy.

How do I find a medical group's NPI or PAC ID?

Each medical group profile lists the group NPI and Medicare PAC ID at the top, with the main address and phone number. The NPI comes from the NPPES NPI Registry and the PAC ID from CMS Medicare enrollment.

How do I find decision makers at Wisconsin medical groups?

Open a group's profile for its parent organization and leaders, then get work emails and mobile numbers through Dmand AI's healthcare waterfall enrichment. 30 days free, self-serve, no credit card.

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