CMS RAC 4

CMS RAC

On April 1, Cotiviti closed on the acquisition of select HMS solutions including CMS RAC Region 4. As the integration process develops over the coming months, HMS solutions that have been acquired by Cotiviti will be appropriately branded.

HMS Federal, the current RAC Region 4 contractor, will now operate as Cotiviti GOV Services. This change will have no impact in the day-to-day contract administration and audit timelines under CMS’ guidance. Please continue to follow the guidance in the improper payment notification letter for submission of medical documentation and discussion period request. Our Provider Relations Team is also available to address any questions you may have regarding Region 4 Audits.

Part A: 1-877-350-7992

Part B: 1-877-350-7993


With the provider portal, you can:

  • Check your claim review status 24/7
  • Review and download audit letters
  • Update contact information
  • Secure web upload of documentation