N921Remark Code (RARC)Active
Effective 03/01/2026

N921 Remark Code - Time Limit for Reconsideration Expired

The N921 remark code indicates that the time limit for filing a reconsideration or appeal has expired. This means that the biller can no longer submit a request for reconsideration regarding the claim in question, as the designated timeframe has elapsed.

How It Relates to the Denial

The N921 remark code typically accompanies a claim adjustment reason code that indicates a denial or adjustment based on the expiration of the appeal period. This combination signals that the claim cannot be revisited due to timing issues.

Common Scenarios

1A claim for a surgical procedure was denied, and the remittance includes a reason code indicating non-payment due to lack of medical necessity. The N921 remark appears, indicating appeal options are no longer available.
→ In this case, the N921 remark clarifies that the time window to appeal the denial has closed, preventing any further action on the claim.
2A provider submitted a claim for a diagnostic test that was denied for being out of network. The remittance shows a reason code for the denial and the N921 remark code states that the appeal period has expired.
→ This remark informs the provider that they can no longer challenge the denial due to the expiration of the filing period.
3A claim for a patient visit was denied due to incorrect coding, and the remittance includes a reason code for the adjustment. The N921 remark indicates that the time limit for appealing this decision has passed.
→ The N921 remark signifies to the biller that no further action can be taken to contest the denial since the appeal time limit has expired.

What to Do

  1. Do not attempt to resubmit the claim for reconsideration or appeal.
  2. Accept the denial as final and adjust the accounts receivable accordingly.

What to Check

  • The original claim submission date to verify the filing timeline.
  • The payer's policy on appeal timeframes to understand the limits.
  • The remittance advice for the original reason code relating to the claim adjustment.