CO-286: Appeal Time Limits Not Met
CO-286 means your appeal missed the deadline. Check for good cause exceptions or second-level appeal options with different timelines.
What Does CO-286 Mean?
When paired with Group Code CO, the missed appeal deadline is a contractual issue. The provider missed the contractual timeframe for filing an appeal and absorbs the denied amount. The provider cannot transfer the cost to the patient. Explore good cause exceptions or alternative appeal routes.
CARC 286 means the payer rejected your appeal because it was not filed within the required timeframe. Payers establish specific deadlines for appeals — typically ranging from 60 to 180 days from the date of the initial denial, depending on the payer and plan type. Medicare generally allows 120 days for a redetermination request.
This code represents a procedural failure rather than a clinical or coverage determination. The payer is not saying your appeal lacks merit — it is saying the appeal arrived too late to be considered through the standard process.
The most common causes are delayed identification of denials requiring appeal, internal workflow bottlenecks that slow down documentation gathering and appeal preparation, and misunderstanding of the appeal deadline calculation (starting from the wrong date). Some payers allow good cause exceptions for missed deadlines, and external review or second-level appeal processes may have different timelines.
Common Causes
| Cause | Frequency |
|---|---|
| Appeal submitted after the payer's deadline The appeal was filed after the payer's specified timeframe for appeal submission, typically 60-180 days depending on the payer | Most Common |
| Delayed identification of denial requiring appeal The denial was not identified and flagged for appeal in a timely manner, causing the appeal deadline to pass | Common |
| Internal processing delays Internal workflows for gathering documentation, obtaining provider input, and preparing the appeal took longer than the allowed timeframe | Common |
| Incorrect understanding of appeal deadline Staff misunderstood the appeal deadline or calculated the deadline incorrectly from the wrong starting date | Occasional |
How to Resolve
- Confirm the deadline has passed Verify the appeal deadline and confirm it is calculated correctly.
- Check for good cause exceptions Determine if the payer allows late appeals with justified reasons.
- Explore second-level or external review Check if alternative appeal processes with different deadlines are available.
- File late appeal with justification If a good cause exception is possible, submit the appeal with documentation explaining the delay.
- Escalate if payer error caused the miss If the payer's late notification or system error caused the missed deadline, escalate accordingly.
Check if the payer allows good cause exceptions for missed appeal deadlines. If so, file a late appeal with a cover letter explaining the reason for the delay and providing documentation of extenuating circumstances. If no exception is available, check for external review options or second-level appeal processes with different deadlines.
Common RARC Pairings
The RARC code tells you exactly what triggered the CO-286:
| RARC | Description |
|---|---|
| N381 | Alert: Consult your contractual agreement for restrictions, billing, and payment information. Review the payer's appeal time limit provisions in the contract to verify the deadline that was missed → |
How to Prevent CO-286
- Establish a robust appeals management process with clear timeline tracking from the date of initial denial
- Promptly identify and flag denials that require appeal within the first few days of receipt
- Implement automated deadline tracking and alert systems for appeal time limits
- Streamline communication between billing, coding, and clinical staff to accelerate appeal preparation
- Train staff on payer-specific appeal deadlines and procedures
- Conduct regular audits of appeal processing times to identify bottlenecks
Also Filed As
The same CARC 286 may appear with different Group Codes:
Related Denial Codes
Sources
- https://www.mdclarity.com/denial-code/286
- https://resdac.org/sites/datadocumentation.resdac.org/files/Adjustment%20Reason%20Code%20Code%20Table%20(TAF%20Claims).txt
- https://x12.org/codes/claim-adjustment-reason-codes
- Codes maintained by X12. Visit x12.org for official definitions.