Providers
765
Locations
18
Specialties
12
Insurance Plans
68
About Mercy Health System Corporation
Background and practice information
Mercy Health System Corporation is a large multi-specialty medical practice based in Janesville, WI, with 765 affiliated healthcare providers practicing across 18 locations in 2 states.
The practice brings together providers across multiple specialties, including diagnostic radiology, nurse practitioner, emergency medicine, and family practice. Its providers are in-network with 68 insurance plans, though coverage varies by individual provider and should be confirmed before scheduling.
Across its providers, the practice has a strong average Merit-based Incentive Payment System (MIPS) score of 89.5 out of 100, a quality measure published by the Centers for Medicare & Medicaid Services.
Practice Locations
18 locations
Mercy Health System CorporationPrimary
500 W HWY 22, Barrington, IL 600102313
(847) 381-3000
Janesville, WI
491 providers
Crystal Lake, IL
220 providers
Harvard, IL
89 providers
Lake Geneva, WI
75 providers
Woodstock, IL
34 providers
Beloit, WI
18 providers
Mchenry, IL
13 providers
Williams Bay, WI
8 providers
Whitewater, WI
8 providers
Milton, WI
8 providers
Delavan, WI
4 providers
Elkhorn, WI
3 providers
Brodhead, WI
3 providers
Evansville, WI
3 providers
Algonquin, IL
3 providers
Edgerton, WI
2 providers
Rockford, IL
1 provider
Affiliations
Hospitals where providers at Mercy Health System Corporation hold admitting privileges
Insurance Networks
Accepted insurance plans and networks
Mercy Health System Corporation accepts 304 plans from 16 insurers, including HCSC: BCBS Illinois, Cigna, Humana.
Source: CMS Transparency in Coverage filings (March 2026). Network participation may change — verify with the provider's office before scheduling.
Quality & Performance
Specialties at Mercy Health System Corporation
Provider specialties represented at this practice
Healthcare Providers in Barrington
1 providers practice here
Frequently Asked Questions
Common questions about Mercy Health System Corporation
How many providers are at Mercy Health System Corporation?
Mercy Health System Corporation has 765 affiliated healthcare providers across 18 locations. You can browse the full provider roster, with specialties and locations, on this page.
What specialties does Mercy Health System Corporation offer?
The practice includes providers in diagnostic radiology, nurse practitioner, emergency medicine, and family practice, among others. Use the specialty filter on the provider list to find a specific type of provider.
What insurance does Mercy Health System Corporation accept?
Providers at Mercy Health System Corporation are collectively in-network with 68 insurance plans. Acceptance varies by individual provider, so confirm your specific plan with the office before your visit.
Does Mercy Health System Corporation have a quality rating?
The practice's providers have an average MIPS quality score of 89.5 out of 100, based on Centers for Medicare & Medicaid Services data. MIPS measures performance across quality, cost, care coordination, and use of health technology.
Where is Mercy Health System Corporation located?
Mercy Health System Corporation's primary location is in Janesville, WI, with 17 additional locations listed on this page. See the contact section for the full address and phone number.
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