Overview
Illinois requires insurers to process clean claims within 30 days under 215 ILCS 5/368a. Claims submitted electronically or on paper begin the 30-day clock upon receipt. Insurers must notify you of receipt within 5 business days. The timely filing deadline is a hard requirement; after 30 days, the claim is deemed paid unless the insurer can prove it was incomplete.
Key Requirements
- Submit claims with all required fields: valid member ID, provider NPI, date of service, and appropriate diagnosis and procedure codes.
- Verify submission through tracking or confirmation response within 5 business days.
- Insurers must explain any claim rejection within the 30-day window, identifying why it fails as a clean claim.
- If resubmitted after rejection, a new 30-day period begins upon receipt of corrected claim.
- Insurers pay 9% annual interest on claims paid beyond 30 days, compounded daily.
Penalties and Enforcement
The Illinois Department of Insurance enforces timely filing violations. Violations result in fines and mandatory interest payments to providers. Insurers found systematically violating the 30-day requirement face license sanctions. Interest accrues daily at 9% per annum. Consumers and providers can file complaints with IL DOI, which investigates and compels payment if violation is confirmed.
Appeals and Exceptions
Claims may be subject to additional review if they lack documentation, contain coding errors, or request services outside coverage. Incomplete claims are exempt from the 30-day requirement. Once the insurer notifies you of deficiency, you have 30 days from resubmission to receive a decision. Clean claim status is the threshold; if met, the 30-day clock applies.
Interaction with Federal Law
Illinois timely filing rules align with the federal No Surprises Act for emergency and non-emergency out-of-network services. The 30-day standard is more aggressive than many federal timelines. Federally-qualified providers receive the same 30-day requirement. NSA protections do not extend the Illinois clock but reinforce timely payment expectations.
Common Questions
What counts as a clean claim in Illinois?
A clean claim has all required data elements, correct provider credentials, accurate member identification, and proper coding without contradictions or missing documentation.
Does the 30-day clock restart if my claim is incomplete?
No. Incomplete claims fall outside the 30-day window. Insurers must notify you within 30 days that the claim is incomplete. Once you resubmit complete information, a new 30-day period begins.
Track Illinois Deadlines Automatically
Altair tracks timely filing deadlines by state and payer. See how it works.
State laws change. This reference is current as of 2026-04-06. Consult state statutes or a healthcare attorney for definitive guidance.