Once received, how long do I have to complete the revalidation information?

The revalidation is to be submitted by the due date on the revalidation letter. The revalidation can be completed via Internet-based PECOS or download and submit a completed CMS 855S along with all required documentation. If the information is not received timely, the supplier is subject to inactivation of its billing privileges.

CMS lists the records that need revalidation on their website.  CMS sets every supplier’s revalidation due-date at the end of a month, and posts the upcoming six months online.

Contact NSC

Email National Supplier Clearinghouse

Contact a specific NSC department

Telephone: 866-238-9652

IVR: 866-238-9652


National Supplier Clearinghouse

Palmetto GBA, AG-495

P.O. Box 100142

Columbia, SC 29202-3142

Other Palmetto GBA Sites

Palmetto GBA Home

DMEPOS Competitive Bidding Program

Jurisdiction J Part A MAC

Jurisdiction J Part B MAC

Jurisdiction M Part A MAC

Jurisdiction M Part B MAC

Jurisdiction M Home Health and Hospice MAC


National Supplier Clearinghouse MAC


RRB Specialty MAC Providers

RRB Specialty MAC Beneficiaries