Alert detail
CMS Transmittal R13833MSP: Creating Additional Medicare Secondary Payer (MSP) Error Codes to Better Identify Incoming MSP…
Policy ID: CMS-T-R13833MSPSpecialty: Multi-specialtyAdded: 6/17/2026Effective: October 5, 2026transmittal
What changed
New MSP error codes effective October 2026.
Who’s affected: Multi-specialty billing teams · Effective: October 5, 2026
Primary source: View the official CMS/MAC document ↗
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