N521Remark Code (RARC)Active
Effective 11/01/2009

N521 Remark Code - Provider Information Mismatch

The N521 remark code indicates that there is a discrepancy between the provider information submitted on the claim and the information that the payer has on file. This mismatch can lead to claim denials or adjustments, as the payer may not recognize the provider associated with the billed services.

How It Relates to the Denial

The N521 remark code typically accompanies a Claim Adjustment Reason Code that relates to provider-related adjustments or denials. The combination of these codes signals that the claim has been impacted due to provider information issues, requiring further investigation to resolve the discrepancy.

Common Scenarios

1A claim was submitted for a specialist visit under Dr. Smith's NPI, but the remittance shows the N521 remark code.
→ This suggests that the payer's records do not match the provider information submitted, potentially indicating that the NPI is incorrect or not registered with the payer.
2A facility billed for outpatient services provided by a specific physician, but the remittance returned with an adjustment and included the N521 remark code.
→ This points to a mismatch in the physician's details, such as their name or NPI, which the payer is unable to validate against their system.
3An urgent care center submitted a claim for treatment rendered by a new provider, and the remittance response included the N521 remark code along with a denial.
→ This indicates that the payer could not verify the new provider's information based on their existing records, affecting the claim's processing.

What to Do

  1. Verify the provider's information submitted on the claim against the payer's records.
  2. Correct any discrepancies in the provider's name, NPI, or other identifying information before resubmitting the claim.
  3. If necessary, contact the payer to confirm the correct provider information they have on file.

What to Check

  • The claim submission records for accuracy in the provider's details.
  • The payer's provider database or directory to confirm the information they have on file.
  • Any prior communications or agreements with the payer regarding provider credentials or updates.