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    Illinois/Guide

    How to Dispute a Medical Bill in Illinois

    Challenge incorrect, inflated, or surprise medical bills using the No Surprises Act and state balance billing protections. Illinois residents are protected by the Consumer Fraud and Deceptive Business Practices Act (815 ILCS 505/1). Private right of action.

    Illinois Consumer Protections

    815 ILCS 505/1

    Private right of actionAuto-renewal law
    1

    Request an itemized bill

    Call the billing department and request a detailed itemized bill with CPT codes. 80% of medical bills contain errors — you need the detail to find them.

    2

    Compare to your EOB

    Check your insurance company's Explanation of Benefits. Compare what was billed vs what insurance approved. Look for charges insurance already covered.

    3

    Check for common errors

    Look for: duplicate charges, unbundling (charging separately for items usually billed together), upcoding (billing a more expensive procedure than performed), charges for services not received.

    4

    Determine if No Surprises Act applies

    If you received an out-of-network bill at an in-network facility, or a surprise emergency room bill, the No Surprises Act protects you. You can only be charged in-network rates.

    5

    Send a written dispute

    Write to the billing department citing specific errors and the relevant law (No Surprises Act, state balance billing law). Include your itemized bill markup showing the errors.

    6

    Negotiate if valid

    Even if the bill is technically correct, hospitals routinely accept 40-60% of the billed amount. Ask for a hardship discount or payment plan. Request their financial assistance policy.

    ALWAYS request an itemized bill — never pay a summary bill
    The No Surprises Act applies to emergency services at ALL facilities
    Hospitals have financial assistance policies they don't advertise
    Medical debt can't appear on credit reports for 365 days (gives you time to dispute)
    Illinois LawsFull Guide