Effective June 19, 2026, providers will have the capability through the Noridian Medicare Portal (NMP) to submit Medicare Secondary Payer (MSP) adjustment requests for all Part B MSP claims. Similar to the appeals process, supporting documentation must be uploaded, and MSP has up to 45 calendar days to respond.

Use the new MSP inquiry form submission feature for requests such as:

• Not related to no-fault, workers’ comp, liability, and Medicare Set-Asides
• Medicare paid primary or secondary in error
• Incorrect MSP type (2-digit) submitted on previously processed claim

A confirmation number is provided upon submission and supports improved processing efficiency and reduced administrative burden. Save time with this electronic submission of the MSP correspondence and no mailing or faxing required.

Do not use for non-MSP redeterminations, new CMS-1500 claim submissions, refunds, Veteran’s Administration (VA), TRICARE PACMED, or U.S. Family Health Plan (USFHP) cases.