835 Denial Combination
CO-29+N281
Contractual Obligation · Claim-Level Adjustment
Timely FilingWhat This Combination Means
This claim was denied for late filing, but the payer has identified an additional issue with the pay-to provider address on the submitted claim. The RARC suggests that an address deficiency may have contributed to processing delays or the claim being lost in transit, though the primary denial reason remains the expired filing deadline. The provider must write off the amount and cannot pursue payment from the patient.
Financial Responsibility
provider writeoff
The provider must absorb the full amount as a contractual write-off due to the expired filing deadline. No balance may be transferred to the patient.
N/A
Appeal Success
30-60 days (appeal process)
Avg. Resolution
Hard
Difficulty
No
Appealable
Step-by-Step Resolution
Steps tailored specifically to this CO-29+N281 combination — not generic advice.
- 1
Verify original claim submission date using clearinghouse or payer portal tracking records
Obtain proof of original submission to determine if the claim was filed within the contractual timely filing window and whether the address deficiency caused processing delays
- 2
Audit the pay-to provider address fields in both original and current claims
Compare the address submitted against the payer's enrollment records to identify the specific missing, incomplete, or invalid element flagged by RARC N281
- 3
File a formal appeal with documentation showing timely original submission and evidence linking the address issue to processing delays
Include proof of timely filing, correspondence demonstrating the address deficiency caused the delay, and corrected claim with valid pay-to address per payer enrollment file
Specialty Context
How CO-29+N281 typically presents across different practice types.
Dental
Dental claims often have shorter timely filing windows (90-180 days). Verify the address on file matches the National Provider Identifier (NPI) registration and payer credentialing records for the pay-to provider or billing service.
Medical
Medical practices using billing companies or remittance addresses different from the servicing location must ensure pay-to addresses match payer enrollment. Address discrepancies may route claims incorrectly, causing delays that trigger timely filing denials.
Behavioral Health
Behavioral health providers frequently use centralized billing addresses separate from multiple service locations. Confirm the pay-to address used matches the Tax ID and NPI combination on file with the payer to avoid routing delays.
Individual Code References
View the standalone definition for each code in this combination.
Medicare Contractor Guidance for CARC 29
Noridian + uhc + aetna + bcbs_azThe time limit for filing has expired. Claims must be filed within one year of the date of service. If an act of nature, such as a flood, fire, or there are other circumstances outside of the supplier's control, you can appeal the timely filing, by providing this explanation.
How to Prevent CARC 29 Denials
- ✓
Review the date of service prior to submitting the claim. All claims must be filed within one year of the date of service.
- ✓
Reopenings must be submitted one year from initial determination date or after one year from receipt date due to overpayment via clerical error omissions
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