You look so foolish when it comes to calling people alts and getting that wrong. Just like your "woman's intuition", which is laughable based on how many times you are proven wrong!
But whichever answer AI gave is correct, the Medicare payroll tax that people pay funds Medicare Part A (Hospital Insurance).
Retirees have to pay separate premiums for doctor visits (Part B) and drugs (Part D). The Part B monthly premium of $202.90 is automatically deducted from someone's monthly Social Security check.