"Do you have a Medicare health insurance card," another asked before later adding, "What's your card number?"Defrauding the systemFoss said in 2021, the schemes are cheap and work.  A spokesperson for the Centers for Medicare & Medicaid Services explained to Insider that the end goal for the scammers spoofing the 1-800-MEDICARE line is to pile up charges to Medicare and steal the victim's identity. "With this in mind, it's unclear why the Centers for Medicare & Medicaid Services use the phone line for both outbound and inbound calls