Section 6401 (a) of the Affordable Care Act established a requirement for all enrolled providers and suppliers to revalidate their enrollment information under new enrollment screening criteria. Every five years, CMS Medicare Administrative Contractors will ask providers to submit a complete and up-to-date enrollment application.

You will be able to submit your application via paper (CMS-855 form) or electronically through the internet-based PECOS (Provider Enrollment, Chain, and Ownership System). CMS urges you to use internet-based PECOS for responding to the request for revalidation – and for most other updates that may need to be made to your provider enrollment records.

Letters Being Mailed in Phases

CMS has posted a listing of all providers and suppliers who have been mailed a revalidation notice. The files are broken down by the month in which the revalidation request was mailed. CMS will add lists on a rolling monthly basis. To see the listing, click on Revalidations in the downloads section on the CMS Medicare Provider/Supplier Enrollment website.

If you are listed and have any questions, please call our Provider Contact Center at the number listed below:


Alabama, Georgia, or Tennessee Part B Provider Enrollment
Attn: Provider Enrollment
P O Box 6169
Indianapolis, IN 462061-877-567-7271**
TDD 1-877-467-7516
** Using the Interactive Voice Response system, select option 6 for questions related to revalidation.

Do you have additional questions?

Any questions concerning provider enrollment policy or your provider’s situation should be referred to our Provider Contact Center at the dedicated toll-free number. Questions concerning a system issue regarding PECOS should be referred to the CMS EUS Help Desk at 1-866-484-8049, or send an e-mail to

Additional information can be obtained from the CMS Medicare Provider/Supplier Enrollment website.


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