CO-239: Claim Spans Eligible and Ineligible Periods — Rebill

What Does CO-239 Mean?

CO-239 rejects the entire claim as a contractual requirement — the payer will not process a claim that spans coverage boundaries. This is not a permanent denial but a procedural rejection requiring the provider to rebill correctly. No payment is issued until the split claims are submitted.

CARC 239 is a rebilling instruction, not a permanent denial. The payer has identified that your claim's dates of service cross a coverage boundary — part of the period was covered and part was not — but instead of processing the eligible portion (as with CARC 238), the payer is returning the entire claim and asking you to split it into separate submissions.

This code appears when the payer cannot or will not perform the date-splitting on their end. The provider must identify the exact date where coverage changes, create one claim for the eligible period and another for the ineligible period, and submit them separately. The eligible-period claim goes to the payer for normal processing. The ineligible-period claim goes to whatever coverage was active during that time, or to the patient if no coverage existed.

CARC 239 typically appears with CO (the entire claim is rejected as a contractual requirement to rebill correctly) or OA (when the situation involves coordination between multiple payers). The key difference from CARC 238: with 238 the payer has already made the split and paid the eligible portion; with 239 you have to do the splitting yourself.

Common Causes

How to Resolve

Identify the coverage boundary date, split the claim into separate submissions for each period, and rebill to the appropriate payer for each period.

1. Verify eligibility dates Confirm the patient's exact coverage start and end dates with the payer to identify the coverage boundary within the claim.
2. Split and resubmit Create separate claims for the eligible and ineligible periods with accurate date ranges and properly allocated charges. Submit the eligible-period claim to the payer.
3. Address the ineligible period Submit the ineligible-period claim to any other active coverage or bill the patient if no other insurance existed during that time.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-239:

How to Prevent CO-239

• Verify patient eligibility for the complete service date range before submitting claims
• Implement billing system alerts that flag claims crossing eligibility boundary dates
• For multi-day institutional stays, perform periodic eligibility re-checks during the admission
• Submit claims promptly to minimize the risk of coverage changes between service and billing

General Prevention

• Verify patient eligibility for the complete range of service dates before submitting claims, especially for multi-day institutional stays
• Implement real-time eligibility verification systems that check coverage status at each encounter
• Set up billing system alerts that flag claims spanning eligibility boundary dates and prompt the biller to split the claim
• Submit claims promptly to minimize the risk of coverage changes occurring between service and billing dates
• For long-term care and institutional stays, perform periodic eligibility re-checks during the admission to catch coverage changes early

Also Filed As

The same CARC 239 may appear with different Group Codes:

Related Denial Codes