Timely Filing Calculator

Deadline = date of service (or discharge date, for institutional claims) + the payer's timely filing limit in days. Most payers count calendar days, not business days, from the date of service.

Original Medicare requires claims to be filed within 12 months (1 calendar year) of the date of service — one of the longer standard limits among major payers.

Each insurance payer (commercial, Medicaid, Medicare, and each state's specific Medicaid program) sets its own timely filing limit in its provider contract or regulations — commercial payers commonly range from 90 to 180 days, while some Medicaid programs are as short as 90 days or as long as a year.

No — secondary-payer claims and corrected/resubmitted claims often have separate, usually shorter deadlines counted from the primary payer's EOB date or the original submission, not the original date of service. Always check your specific payer's provider manual for those rules.