Medicare Secondary Payer Manual (Pub. 100-05), Ch. 6 § 30.1.2
CWF/MSP Transaction Request for Contractor Assistance
30.1.2 - CWF/MSP Transaction Request for Contractor Assistance
(Rev. 12078; Issued:06-14-23; Effective: 05-29-23; Implementation: 05-29-23)
Instances occur when the A/B MAC or DME MAC determines that the MSP effective
date is not correct. When this happens, the contractor shall advise the MSP Contractor,
via ECRS, of the need to change the MSP effective date and shall provide the MSP
Contractor with documentation to substantiate the change.