Updated October 2026

Largest primary care groups in Illinois

Medical group directory
Illinois
Primary care

Groups: 1,232
Internal Medicine groups: 586
Family Medicine groups: 306
Internal medicine specialists: 7,661
Family physicians: 1,436

There are 1,232 primary care groups in Illinois with a Medicare PAC ID: 586 internal medicine, 306 family medicine, 302 nurse practitioner, 28 physician assistant, 7 general practice and 3 clinical nurse specialist. Northwestern Medical Faculty Foundation is the largest internal medicine group, with 920 internal medicine specialists, and PCC Community Wellness Center the largest family medicine group, with 93 family physicians.

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Northwestern Medical Faculty Foundation is the largest primary care 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. 59 Illinois groups have 100 or more physicians.

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Primary care groups in Illinois, ranked by physicians, 51 to 100
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
51	Northwestern Medicine Central DuPage HospitalWinfield · 7 sites	Parent on file	126	178	Decision makers
52	Integritas ProvidersCarbondale · 10 sites	Parent on file	125	144	Decision makers
53	Morris Hospital & Healthcare CentersMorris · 30 sites	Parent on file	118	178	Decision makers
54	GI Alliance of IllinoisElgin · 50 sites	Parent on file	117	227	Decision makers
55	Oak Street HealthChicago · 41 sites	Parent on file	115	301	Decision makers
56	Nephrology Associates of Northern Illinois and Indiana (NANI)Oak Brook · 48 sites	-	115	155	Decision makers
57	PCC Community Wellness CenterOak Park · 18 sites	Parent on file	109	218	Decision makers
58	SSM Health Medical GroupMount Vernon · 33 sites	Parent on file	102	184	Decision makers
59	Rush Copley Medical CenterAurora · 20 sites	Parent on file	100	180	Decision makers
60	Decatur Memorial HospitalDecatur · 15 sites	Parent on file	99	186	Decision makers
61	UChicago Medicine Medical GroupHarvey · 25 sites	Parent on file	99	123	Decision makers
62	Integritas ProvidersCarbondale · 9 sites	Parent on file	94	115	Decision makers
63	Presence Medical GroupElk Grove Village · 55 sites	Parent on file	93	114	Decision makers
64	Metro Infectious Disease ConsultantsBurr Ridge · 210 sites	-	92	282	Decision makers
65	Genesis Health SystemSilvis · 31 sites	Parent on file	91	126	Decision makers
66	ProHealth Medical GroupPekin · 12 sites	Parent on file	89	124	Decision makers
67	Lawndale Christian Health CenterChicago · 8 sites	Parent on file	85	182	Decision makers
68	SIHF HealthcareSauget · 51 sites	Parent on file	84	168	Decision makers
69	UnityPoint Health - Trinity Rock IslandRock Island · 22 sites	Parent on file	80	134	Decision makers
70	Premier Occupational Health at Silver CrossNew Lenox · 14 sites	Parent on file	77	138	Decision makers
71	OSF Saint James - John W. Albrecht Medical CenterPeoria · 13 sites	Parent on file	76	195	Decision makers
72	Best Practices Inpatient CareBarrington · 12 sites	Parent on file	76	145	Decision makers
73	Carle Eureka HospitalEureka · 3 sites	Parent on file	75	96	Decision makers
74	KSB HospitalDixon · 8 sites	Parent on file	71	121	Decision makers
75	Memorial Care on Koke MillSpringfield · 20 sites	Parent on file	69	207	Decision makers
76	Sarah D. Culbertson Memorial HospitalRushville · 3 sites	Parent on file	68	89	Decision makers
77	Prairie CardiovascularSpringfield · 32 sites	Parent on file	67	118	Decision makers
78	McDonough District HospitalMacomb · 8 sites	Parent on file	66	134	Decision makers
79	Esperanza Health CentersChicago · 14 sites	Parent on file	66	129	Decision makers
80	Rush Copley Medical CenterAurora · 8 sites	Parent on file	60	81	Decision makers
81	Physicians Immediate CareChicago · 86 sites	Parent on file	57	491	Decision makers
82	Pana Community HospitalPana · 8 sites	Parent on file	57	96	Decision makers
83	Anderson Medical GroupMaryville · 34 sites	Parent on file	56	129	Decision makers
84	Midwest Emergency Department Services (MEDS)O'Fallon · 16 sites	Parent on file	55	97	Decision makers
85	Linden Oaks HospitalNaperville · 4 sites	Parent on file	55	57	Decision makers
86	HSHS St. Anthony's Memorial HospitalSpringfield · 11 sites	Parent on file	53	88	Decision makers
87	GI Partners of IllinoisLibertyville · 15 sites	-	53	80	Decision makers
88	Associates in NephrologyChicago · 92 sites	-	52	59	Decision makers
89	Howard Brown HealthChicago · 16 sites	Parent on file	51	153	Decision makers
90	OSF Medical Group, MendotaPeoria · 12 sites	Parent on file	51	102	Decision makers
91	HSHS Medical GroupSpringfield · 2 sites	Parent on file	51	59	Decision makers
92	Little Company of Mary Oak Lawn Care StationOak Lawn · 9 sites	Parent on file	51	58	Decision makers
93	Iroquois Memorial HospitalWatseka · 6 sites	Parent on file	50	64	Decision makers
94	Thorek Memorial HospitalChicago · 7 sites	Parent on file	50	64	Decision makers
95	Chicago Health Medical GroupChicago · 6 sites	Parent on file	50	59	Decision makers
96	MEDS (Midwest Emergency Department Services)O'Fallon · 7 sites	Parent on file	49	92	Decision makers
97	Advance Inpatient MedicineOak Brook · 5 sites	Parent on file	46	56	Decision makers
98	Heartland Health ServicesPeoria · 11 sites	Parent on file	45	75	Decision makers
99	UChicago Medicine AdventHealth Medical Group Heart & Vascular at HinsdaleHinsdale · 14 sites	Parent on file	44	69	Decision makers
100	Carlinville Area Hospital & ClinicsCarlinville · 5 sites	Parent on file	41	80	Decision makers

Showing 51 to 100 of 1,232 primary care groups in Illinois

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

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