Updated October 2026

Medical groups in Illinois

Medical group directory
Illinois

Medical groups: 4,250
Multi-specialty: 847
Single-specialty: 3,403
More than one site: 1,970
100+ physicians: 73

There are 4,250 medical groups in Illinois with a Medicare PAC ID. Northwestern Medical Faculty Foundation is the largest, with 3,118 Illinois physicians. Northwestern Medicine has the most physicians across its groups, 3,995, and 69% of Illinois groups are independent.

Find the decision makers at all 4,250 Illinois medical groups

Work emails and mobile numbers for practice owners, administrators and physician leaders, found through healthcare waterfall enrichment, with a free Dmand AI account.

View contacts for free

Northwestern Medical Faculty Foundation is the largest medical group in Illinois, with 3,118 physicians

Ranked by physicians with an Illinois address linked to each group. Endeavor Health Medical Group is second with 3,048, and Dreyer Medical Clinic (Advocate Medical Group) third with 3,020. 73 Illinois groups have 100 or more physicians.

Filter this list with a free account

Sort and filter all 4,250 Illinois medical groups by specialty, city, parent organization, group size, EHR in use and decision makers in Dmand AI.

Filter in Dmand AI

Medical groups in Illinois, ranked by physicians
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1	Northwestern Medical Faculty FoundationChicago · 265 sites	Parent on file	3,118	5,140	Decision makers
2	Endeavor Health Medical GroupEvanston · 314 sites	Parent on file	3,048	5,007	Decision makers
3	Dreyer Medical Clinic (Advocate Medical Group)Aurora · 329 sites	Parent on file	3,020	4,663	Decision makers
4	OSF Multi-Specialty GroupPeoria · 364 sites	-	1,582	2,917	Decision makers
5	University of Illinois Physicians Group (UIPG)Chicago · 150 sites	Parent on file	1,463	2,083	Decision makers
6	UChicago Medicine PhysiciansBurr Ridge · 53 sites	Parent on file	1,436	2,322	Decision makers
7	UChicago Medicine Physicians (University of Chicago Physicians Group)Burr Ridge · 96 sites	Parent on file	1,398	2,195	Decision makers
8	Rush University InternistsChicago · 133 sites	Parent on file	1,347	2,186	Decision makers
9	Carle Physician GroupUrbana · 207 sites	Parent on file	1,234	2,261	Decision makers
10	Northwestern Medicine Regional Medical GroupCarol Stream · 142 sites	Parent on file	1,172	1,683	Decision makers
11	John H. Stroger, Jr. Hospital of Cook CountyChicago · 78 sites	Parent on file	1,149	1,572	Decision makers
12	Lurie Children's Medical GroupChicago · 61 sites	Parent on file	956	1,487	Decision makers
13	DuPage Medical GroupDowners Grove · 167 sites	Parent on file	904	1,596	Decision makers
14	Loyola University Medical CenterMaywood · 52 sites	Parent on file	841	1,144	Decision makers
15	Mercyhealth PhysiciansRockford · 80 sites	Parent on file	577	782	Decision makers
16	Carle Health Methodist HospitalPeoria · 63 sites	Parent on file	426	754	Decision makers
17	Sinai Medical GroupChicago · 54 sites	Parent on file	421	609	Decision makers
18	SIU MedicineSpringfield · 42 sites	Parent on file	402	608	Decision makers
19	Springfield ClinicSpringfield · 85 sites	-	372	771	Decision makers
20	Carle Physician GroupUrbana · 58 sites	Parent on file	362	592	Decision makers
21	Sarah Bush LincolnMattoon · 64 sites	Parent on file	334	595	Decision makers
22	Prime Healthcare Illinois Medical GroupDes Plaines · 61 sites	Parent on file	324	413	Decision makers
23	Edward Medical GroupWarrenville · 76 sites	Parent on file	315	620	Decision makers
24	Hoopeston Physician GroupHoopeston · 35 sites	Parent on file	286	517	Decision makers
25	UChicago Medicine AdventHealth Medical GroupLagrange · 75 sites	Parent on file	271	370	Decision makers
26	Northwest Community HealthcareArlington Heights · 28 sites	Parent on file	260	371	Decision makers
27	Southern Illinois Healthcare (SIH)Carbondale · 47 sites	Parent on file	256	525	Decision makers
28	Endeavor Health Medical GroupEvanston · 31 sites	Parent on file	236	337	Decision makers
29	Blessing HospitalQuincy · 44 sites	Parent on file	225	401	Decision makers
30	ACCESS Community Health NetworkChicago · 83 sites	Parent on file	219	472	Decision makers
31	Midwest Anesthesia PartnersEast Dundee · 48 sites	-	219	354	Decision makers
32	SwedishAmerican Medical GroupRockford · 40 sites	Parent on file	215	412	Decision makers
33	Sound PhysiciansChicago · 78 sites	Parent on file	213	270	Decision makers
34	Rush Medical GroupChicago · 35 sites	Parent on file	210	312	Decision makers
35	Carle Richland Memorial HospitalOlney · 23 sites	Parent on file	210	263	Decision makers
36	Erie Family Health CentersChicago · 33 sites	Parent on file	207	364	Decision makers
37	Mercyhealth Hospital-FreeportFreeport · 40 sites	Parent on file	206	250	Decision makers
38	Alexian Brothers Medical Group Specialty CareElk Grove Village · 31 sites	Parent on file	194	290	Decision makers
39	Edward HospitalNaperville · 12 sites	Parent on file	193	272	Decision makers
40	Insight Hospital & Medical Center ChicagoChicago · 16 sites	Parent on file	184	240	Decision makers
41	Select RehabilitationGlenview · 197 sites	Parent on file	182	564	Decision makers
42	Riverside HealthcareKankakee · 35 sites	Parent on file	176	307	Decision makers
43	Proctor Health SystemsPeoria · 37 sites	-	175	317	Decision makers
44	Illinois Bone & Joint InstituteDes Plaines · 90 sites	-	172	659	Decision makers
45	Integrated Imaging ConsultantsPark Ridge · 111 sites	-	172	187	Decision makers
46	Christie ClinicChampaign · 23 sites	-	167	283	Decision makers
47	Elmhurst HospitalElmhurst · 22 sites	Parent on file	167	233	Decision makers
48	Loyola Medical GroupBerwyn · 10 sites	Parent on file	165	201	Decision makers
49	Central Illinois Radiological Associates (CIRA)East Peoria · 199 sites	-	165	179	Decision makers
50	SIU Center for Family MedicineSpringfield · 20 sites	Parent on file	159	270	Decision makers

Showing 1 to 10 of 4,250 medical groups in Illinois

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

Northwestern Medicine has the most physicians in Illinois medical groups, with 3,995 across 11 groups

Dmand AI maps every medical group to its parent organization, up to the health system or platform at the top. 151 parent organizations have two or more Illinois medical groups. Among health systems, Advocate Health has the most groups, 33. Each clinician counts once per parent organization.

Parent organizations with the most Illinois medical groups
#	Parent organization	Illinois groups	Physicians	HCPs
1	Northwestern MedicineHealth system	11	3,995	6,387
2	Endeavor HealthHealth system	21	3,373	5,478
3	Advocate HealthHealth system	33	3,106	4,830
4	UChicago MedicineAcademic health system	14	1,867	2,873
5	Rush University System for HealthAcademic health system	26	1,563	2,573
6	Carle HealthHealth system	11	1,479	2,710
7	Cook County HealthLocal government	2	1,149	1,572
8	Trinity HealthHealth system	27	1,105	1,519
9	Duly Health and CarePhysician practice platform	5	1,035	1,897
10	Ann & Robert H. Lurie Children's Hospital of ChicagoHealth system	2	958	1,491

Top 10 of 151 parent organizations with two or more Illinois groups

Northwestern Memorial HealthCareHealth system · 11 Illinois medical groups
Northwestern Medical Faculty FoundationMulti-specialty group · Chicago
Northwestern Medicine Regional Medical GroupMulti-specialty group · Carol Stream
9 more Illinois groups and their practice sites

See every medical group, site and clinician under Northwestern Medicine

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

Try for free

Source: Dmand AI Org Hierarchy Data

For sales teams

Find the decision makers at Illinois medical groups

Dmand AI maps the owners, administrators and physician leaders at each of the 4,250 Illinois medical groups, with the parent organization above each one, and finds validated work emails and mobile numbers.

Try for free Book a meeting

69% of Illinois 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.

Illinois medical groups by ownership

Independent2,92469%
Health system or hospital40510%
Platform or corporate owner50712%
Community or government1724%
Other organization2426%

Source: Dmand AI Org Hierarchy Data

654 Illinois 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

Primary care groups are the most common medical groups in Illinois, with 1,232

Each group is counted once, under its main specialty. Behavioral and mental health groups are second, with 823, and 847 Illinois groups are multi-specialty.

Source: Dmand AI Professional Profile Data

66,554 Illinois HCPs work in Illinois medical groups, 30,149 of them physicians

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

HCPs in Illinois medical groups by type

Physicians (MD, DO)30,14945%
Nurses and nurse practitioners14,37022%
Behavioral health clinicians7,66712%
Physician assistants4,6377%
Therapists (PT and OT)4,5937%
Other HCPs5,1388%

Source: Dmand AI Affiliation Data

Chicago has the most medical groups in Illinois, with 691

691medical groups in Chicago 117medical groups in Oak Brook 95medical groups in Naperville 82medical groups in Arlington Heights 75medical groups in Rockford 72medical groups in Northbrook

More Illinois cities with medical groups

Source: Doctors and Clinicians National Downloadable File (CMS)

Each Illinois 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 Illinois 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 Illinois

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 Illinois?

There are 4,250 medical groups in Illinois with a Medicare PAC ID: 847 multi-specialty and 3,403 single-specialty.

What is the largest medical group in Illinois?

Northwestern Medical Faculty Foundation in Chicago, with 3,118 physicians and 5,140 HCPs with an Illinois address. Endeavor Health Medical Group is second with 3,048, and Dreyer Medical Clinic (Advocate Medical Group) is third with 3,020.

Which health system has the most medical groups in Illinois?

By physicians, Northwestern Medicine, with 3,995 across 11 groups, followed by Endeavor Health with 3,373 and Advocate Health with 3,106.

How many Illinois medical groups are independent?

2,924, or 69%, have no larger parent organization in the Dmand AI org hierarchy. 405 belong to a health system or hospital and 507 to a physician platform or corporate owner.

How many Illinois medical groups practice at a hospital?

654 Illinois 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 Illinois 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.

Dmand AI

Find the right contacts at every Illinois medical group

Search 4,250 groups by specialty, size and parent organization, with the physicians and leaders at each one.

Start free trial Book a demo

30 days free
Self-serve
No credit card