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.

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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.

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Medical groups in Illinois, ranked by physicians, 51 to 100
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
51	OrthoIllinoisRockford · 48 sites	Parent on file	157	635	Decision makers
52	OSF Saint Anthony's Health CenterAlton · 25 sites	Parent on file	156	289	Decision makers
53	HSHS Medical GroupSpringfield · 68 sites	Parent on file	150	317	Decision makers
54	CGH Medical CenterSterling · 22 sites	Parent on file	147	285	Decision makers
55	Endeavor Health Elmhurst HospitalElmhurst · 9 sites	Parent on file	144	213	Decision makers
56	FHNFreeport · 21 sites	Parent on file	140	187	Decision makers
57	Kirby Medical CenterMonticello · 4 sites	Parent on file	139	178	Decision makers
58	City of Hope Cancer Center ChicagoZion · 15 sites	Parent on file	131	187	Decision makers
59	Illinois Emergency Medicine SpecialistsBolingbrook · 18 sites	Parent on file	130	187	Decision makers
60	Specialists in Medical ImagingOlympia Fields · 206 sites	Parent on file	127	132	Decision makers
61	Quincy Medical GroupQuincy · 31 sites	Parent on file	126	273	Decision makers
62	Northwestern Medicine Central DuPage HospitalWinfield · 7 sites	Parent on file	126	178	Decision makers
63	Saint Anthony HospitalChicago · 30 sites	Parent on file	125	172	Decision makers
64	Integritas ProvidersCarbondale · 10 sites	Parent on file	125	144	Decision makers
65	Community First Medical CenterChicago · 17 sites	Parent on file	122	149	Decision makers
66	Morris Hospital & Healthcare CentersMorris · 30 sites	Parent on file	118	178	Decision makers
67	GI Alliance of IllinoisElgin · 50 sites	Parent on file	117	227	Decision makers
68	Oak Street HealthChicago · 41 sites	Parent on file	115	301	Decision makers
69	Nephrology Associates of Northern Illinois and Indiana (NANI)Oak Brook · 48 sites	-	115	155	Decision makers
70	PCC Community Wellness CenterOak Park · 18 sites	Parent on file	109	218	Decision makers
71	UroPartnersWestchester · 79 sites	Parent on file	105	159	Decision makers
72	SSM Health Medical GroupMount Vernon · 33 sites	Parent on file	102	184	Decision makers
73	Rush Copley Medical CenterAurora · 20 sites	Parent on file	100	180	Decision makers
74	Decatur Memorial HospitalDecatur · 15 sites	Parent on file	99	186	Decision makers
75	UChicago Medicine Medical GroupHarvey · 25 sites	Parent on file	99	123	Decision makers
76	Midwest Center for Women's HealthCareBannockburn · 28 sites	Parent on file	98	131	Decision makers
77	Shirley Ryan AbilityLabChicago · 14 sites	Parent on file	95	123	Decision makers
78	Integritas ProvidersCarbondale · 9 sites	Parent on file	94	115	Decision makers
79	Presence Medical GroupElk Grove Village · 55 sites	Parent on file	93	114	Decision makers
80	Metro Infectious Disease ConsultantsBurr Ridge · 210 sites	-	92	282	Decision makers
81	Prime Illinois Medical GroupChicago · 107 sites	Parent on file	92	94	Decision makers
82	Genesis Health SystemSilvis · 31 sites	Parent on file	91	126	Decision makers
83	ProHealth Medical GroupPekin · 12 sites	Parent on file	89	124	Decision makers
84	WashU Medicine PhysiciansAlton · 50 sites	Parent on file	88	133	Decision makers
85	Lawndale Christian Health CenterChicago · 8 sites	Parent on file	85	182	Decision makers
86	SIHF HealthcareSauget · 51 sites	Parent on file	84	168	Decision makers
87	Rush Oak Park Hospital Emergency Department Physician Group-Oak ParkOak Park · 14 sites	Parent on file	83	124	Decision makers
88	Humboldt Park HealthChicago · 45 sites	Parent on file	83	103	Decision makers
89	Mid-America Emergency PhysiciansSpringfield · 15 sites	Parent on file	82	157	Decision makers
90	UnityPoint Health - Trinity Rock IslandRock Island · 22 sites	Parent on file	80	134	Decision makers
91	DuPage Valley AnesthesiologistsNaperville · 8 sites	-	80	91	Decision makers
92	Graham Medical GroupCanton · 20 sites	Parent on file	79	163	Decision makers
93	SSM Health Good Samaritan Hospital - Mt. VernonMount Vernon · 6 sites	Parent on file	78	124	Decision makers
94	Premier Occupational Health at Silver CrossNew Lenox · 14 sites	Parent on file	77	138	Decision makers
95	OSF Saint James - John W. Albrecht Medical CenterPeoria · 13 sites	Parent on file	76	195	Decision makers
96	Best Practices Inpatient CareBarrington · 12 sites	Parent on file	76	145	Decision makers
97	Carle Eureka HospitalEureka · 3 sites	Parent on file	75	96	Decision makers
98	KSB HospitalDixon · 8 sites	Parent on file	71	121	Decision makers
99	Aurora Emergency PhysiciansYorkville · 10 sites	-	71	93	Decision makers
100	Memorial Care on Koke MillSpringfield · 20 sites	Parent on file	69	207	Decision makers

Showing 51 to 100 of 4,250 medical groups in Illinois

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

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