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, 2,001 to 2,050
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
2001	Illinois Associates in PsychiatryEdwardsville · 1 site	-	1	2	Decision makers
2002	Illinois Back InstituteArlington Heights · 1 site	-	1	2	Decision makers
2003	Illinois Bariatric CenterClinton · 1 site	-	1	2	Decision makers
2004	Illinois Sports Medicine and Orthopaedic CentersGlenview · 2 sites	-	1	2	Decision makers
2005	InfusacareSkokie · 2 sites	Parent on file	1	2	Decision makers
2006	Innovation Health SCGlenview · 2 sites	-	1	2	Decision makers
2007	Insight Psychological Services PLLCChicago · 1 site	-	1	2	Decision makers
2008	Intermed, Ltd.La Grange Park · 1 site	-	1	2	Decision makers
2009	Internal Medicine Specialists of Southern IllinoisBelleville · 1 site	-	1	2	Decision makers
2010	Ivanchenko Pain and RehabBuffalo Grove · 1 site	-	1	2	Decision makers
2011	Jacek Grela, MD, S.C.Lemont · 2 sites	Parent on file	1	2	Decision makers
2012	James Sales, M.D. Psychiatry and Child & Adolescent PsychiatryRock Island · 1 site	-	1	2	Decision makers
2013	Jasmine Wang Chao, D.O., Ltd.Glenview · 1 site	-	1	2	Decision makers
2014	Jeffery Smith OrthopedicsDecatur · 1 site	-	1	2	Decision makers
2015	Joliet Behavioral Health & AssociatesJoliet · 2 sites	-	1	2	Decision makers
2016	Joseph B. Pigato, MD UrologyKankakee · 1 site	-	1	2	Decision makers
2017	Keni ENTPalos Heights · 1 site	-	1	2	Decision makers
2018	Klauber Complete Psychiatric CareChicago · 1 site	-	1	2	Decision makers
2019	Lake Shore Adult & Geriatric MedicineChicago · 1 site	-	1	2	Decision makers
2020	Lake-Cook Healthcare ServicesWaukegan · 1 site	-	1	2	Decision makers
2021	Lakeview Medical and Psychiatric HealthcareMacomb · 1 site	-	1	2	Decision makers
2022	Legacy DermatologyAlgonquin · 1 site	-	1	2	Decision makers
2023	Leszek J Ballarin MD, SCChicago · 1 site	-	1	2	Decision makers
2024	Lifespan Medical AssociatesArlington Heights · 1 site	-	1	2	Decision makers
2025	Lincoln Park Heart CenterChicago · 1 site	-	1	2	Decision makers
2026	Litchfield Oncology InstituteLitchfield · 1 site	Parent on file	1	2	Decision makers
2027	Macomb Oncology Institute / Radiation CenterMacomb · 2 sites	Parent on file	1	2	Decision makers
2028	Malapati Internal MedicineChicago · 1 site	-	1	2	Decision makers
2029	Mannheim Medical AssociatesFranklin Park · 1 site	Parent on file	1	2	Decision makers
2030	Mansoor Khan MD, SCElk Grove Village · 2 sites	Parent on file	1	2	Decision makers
2031	Marcos A. Lopez, M.D, S.C.North Riverside · 2 sites	-	1	2	Decision makers
2032	Master Medical Care LLCSwansea · 1 site	-	1	2	Decision makers
2033	McDonough Eye CareMacomb · 1 site	Parent on file	1	2	Decision makers
2034	MDOC PCBarrington · 1 site	-	1	2	Decision makers
2035	Meadowview Behavioral HospitalPeoria · 1 site	-	1	2	Decision makers
2036	Medical Health ClinicDes Plaines · 1 site	-	1	2	Decision makers
2037	Mediexperts, LLCKankakee · 1 site	-	1	2	Decision makers
2038	Medovate, PLLCBuffalo Grove · 2 sites	-	1	2	Decision makers
2039	Mellon Litigation ServicesJoliet · 1 site	-	1	2	Decision makers
2040	Mercyhealth Whispering Point-McHenryMchenry · 4 sites	Parent on file	1	2	Decision makers
2041	Metropolitan Cardiovascular AssociatesBloomingdale · 1 site	-	1	2	Decision makers
2042	Midwest Alternative Treatment ClinicOak Park · 1 site	-	1	2	Decision makers
2043	Midwest Respiratory Ltd.Burr Ridge · 1 site	-	1	2	Decision makers
2044	Midwest Vascular and Pain SpecialistsWestchester · 1 site	-	1	2	Decision makers
2045	Millennium Park Medical AssociatesChicago · 1 site	-	1	2	Decision makers
2046	Mindful MavensSouth Elgin · 1 site	-	1	2	Decision makers
2047	Mission OpticalHomewood · 1 site	-	1	2	Decision makers
2048	Montgomery County Health DepartmentHillsboro · 2 sites	Parent on file	1	2	Decision makers
2049	Moore Dermatology AssociatesMelrose Park · 1 site	-	1	2	Decision makers
2050	MPS Kohli, MD S.C.Hinsdale · 1 site	-	1	2	Decision makers

Showing 2,001 to 2,050 of 4,250 medical groups in Illinois

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

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