US · guidance
CMS Pub. 100-05, ch. 6, § 20.1
Types of MSP Maintenance Transactions
The three types of maintenance transactions are add, change, and delete.
The MSP Contractor shall use MSP maintenance transaction type "O" (zero) for an add
or a change transaction.
• The transaction is an add when no matching MSP occurrence - NO MATCHING
MSP auxiliary record - is found for the beneficiary;
• The transaction is a change when a matching MSP occurrence is found.
After a successful MSP maintenance transaction processes through CWF, before and
after images of the MSP auxiliary file occurrence are written to the MSP Audit File.
History
(Rev. 12078; Issued:06-14-23; Effective: 05-29-23; Implementation: 05-29-23)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
c60d916742789aef1ac50e086a0f60a0db3430aa661cd95feaf8c444b58eb9f6
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