Article Detail - JF Part A
CWF Errors Leading to Claim Denials Related to Medicare Advantage (MA) Plan Enrollment
Provider/Supplier Type(s) Impacted: Not applicable
Reason Codes: CWF EC 5233
Claim Coding Impact: Not applicable.
Description of Issue: A discrepancy has been identified since the end of September 2025, between HETS and the claims processing systems, leading to claim denials related to Medicare Advantage (MA) plan enrollment. For the CARC/RARC messages related to this issue are: CARC 24.
Noridian Action Required: Noridian will provide updates as they are available.
12/5/25 - Noridian confirmed the new files contain the required updates and new claims will process correctly.
Provider/Supplier Action Required:
12/5/25 - Providers should rebill claims that rejected for the missing MA updates.
Proposed Resolution/Solution: Upon notification from the CWF Host that the issue has been resolved, Noridian will provide additional direction.
12/5/25 - Providers should rebill claims that rejected for the missing MA updates.
Date Reported: 11/14/25
Date Resolved:
