What do you do when an MBI changes? Is it your patients’ turn to wade into the new Medicare card ocean? The Centers for Medicare & Medicaid Services has “started mailing new Medicare cards to people with Medicare who live in Wave 5 states: Alabama, Florida, Georgia, North Carolina, and South Carolina,” the agency says. And don’t forget, “we continue to mail new cards to people who live in Wave 4 states, as well as nationwide to people who are new to Medicare.” If your patients are in Wave 1, 2, or 3 states and haven’t received a new card, have them call 1-800-MEDICARE or log onto MyMedicare.gov to determine what the problem is, CMS advises. Other tips for the new Medicare cards: Cards with the codes on back (Medicare) or front (RRB) “are legitimate (official) Medicare cards,” CMS assures providers.