Medicare Secondary Payer (MSP) Work-Related Injury or Illness

CARC/RARC Description
CO-19 This is a work-related injury/illness and thus the liability of the Worker's Compensation Carrier.
M418 Misrouted claim. See the payer's claim submission instructions.


Common Reasons for Message

  • Medicare Secondary Payer (MSP) insurance type not present
  • Incorrect insurer type
  • Diagnosis codes match the Common Working File

Next Step

  • Claim may be resubmitted with corrected information
  • An MSP form can be submitted.
    • Fill out the top half, and in the "Reason for Request," indicate that the claim does not relate to the work-related injury or illness.

Claim Submission Tips

  • Verify patient's eligibility via Interactive Voice Response (IVR) or the Noridian Medicare Portal
    • If there is a problem with file, patient will need to contact the Benefits Coordination & Recovery Center (BCRC) at 1-855-798-2627 to make necessary corrections
  • Verify that all necessary primary information is correctly submitted on claim


Last Updated Dec 09 , 2023