Balance Billing Laws in Illinois
Your medical billing rights and protections in Illinois.
Illinois passed the Surprise Billing Protection Act (Public Act 101-0526, 2019), which prohibits balance billing for emergency services and for non-emergency services at in-network facilities when patients have no meaningful choice of provider. The law applies to state-regulated health plans and includes a cost-sharing cap and dispute resolution process.
Key Protections in Illinois
Emergency services: Out-of-network emergency providers cannot balance bill; cost-sharing limited to in-network amounts
Out-of-network at in-network facility: Non-emergency out-of-network care at in-network facilities is protected when patients have no choice
Dispute resolution: Illinois has a state-administered dispute resolution process; the insurer pays the provider directly
Transparency: Facilities must post lists of on-call physicians and whether they participate in the network
Filing Information
Within 2 years of the date of service for state-level complaints
Additional Notes
Illinois' Surprise Billing Protection Act became effective January 1, 2020. Self-funded employer plans are governed by the federal No Surprises Act. The state law applies to fully insured individual and group plans regulated by Illinois.
How to File a Complaint in Illinois
Gather Your Documentation
Collect your itemized medical bill, Explanation of Benefits (EOB) from your insurer, any prior authorization documents, and written communications with the provider or insurance company.
File with the State Regulator
Submit your complaint to the Illinois Department of Insurance. Include all supporting documents and a clear description of the billing dispute.
File complaint with Illinois Department of InsuranceFile with CMS if Federal Protections Apply
If your dispute involves the No Surprises Act (emergency care or out-of-network providers at in-network facilities), you can also file directly with the Centers for Medicare & Medicaid Services.
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