The timely filing limit for Aetna is now only 90 days. However, you can appeal the decision if you have proof of timely filing.
Typically 90 days, but it can differ from plan to plan. Your best bet is to call and verify if it has been over 90 days.
90 DAYS
appeal to secondary insurance
WHAT IS THE TIMELY FILING
Timely Filing Limits for Managed Care
FL BCBS timely filing limit is 180 days
claims filing limit
90
90
180
1 YEAR