CO 24 Denial Code - Expert Solutions to Fix & Prevent Claims Denials

The insurer didn’t receive the claim within their required timeframe.

Yes! Submit proof of timely filing (e.g., electronic receipts) via appeal.

To resolve CO 24 denials:

1. Verify Submission Deadlines: Confirm the insurer’s timely filing window (e.g., 90 days for commercial payers, 60 days for Medicaid).
2. Check Claim Dates: Compare the date of service with the submission date—if late, gather proof (e.g., electronic submission receipts).
3. Resubmit or Appeal: If the claim was submitted on time but denied incorrectly, appeal with supporting documents. For late claims, request a waiver if permitted.
4. Prevent Future Issues: Automate deadline alerts in your billing software and train staff on payer-specific rules.

Pro Tip: Medicaid CO 24 denials often require faster action—appeal within 10–15 days for best results.

The CO 24 denial code means the insurer rejected the claim because it was filed after their deadline. Common reasons include:

• Missing the payer’s timely filing window (e.g., 1 year for Medicare, 60 days for some Medicaid plans).
• Errors in Coordination of Benefits (COB), causing delays in submitting to the correct payer.
• System errors (e.g., failed electronic submissions, missed batch uploads).

Example: A claim submitted 95 days after service to a payer with a 90-day deadline triggers CO 24.

Occurrence Code 24 (unrelated to CO 24 denial codes) refers to the date of accident or illness onset on a claim. However, if you’re asking about CO 24 denial codes:

• CO 24 strictly relates to late claim submissions.
• Occurrence Code 24 is used to document event timelines (e.g., injury dates).