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Department of Employee Trust Funds
Revised March 22, 2018

Medicare Numbers Changing

The Centers for Medicare and Medicaid Services has begun transitioning to new Medicare Beneficiary numbers and moving away from using Medicare claim numbers as a way to identify participants. Medicare participants will receive a new Medicare card in the mail from the CMS. This CMS process may take up to a year to complete. If you participate in the State of Wisconsin Group Health Insurance Program and are on Medicare, you do not have to do anything -- we will update our system to reflect this Medicare number change.

For More Information

FAQs: Medicare Numbers

CMS: New Medicare cards start mailing April 2018
(Includes state-by-state mailing schedule)

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