Be Aware of New Medicare Cards Due to Data Breach Published on October 18, 2024 Genesee County residents who receive Medicare should look out for new Medicare cards in the mail in the coming weeks. The Centers for Medicare & Medicaid Services (CMS) issued these new cards after a cybersecurity breach affected nearly one million beneficiaries nationwide. If you were one of the individuals affected, you will receive a new card in the mail. Tagged as: , Announcements, Community Safety