The cost of monthly premiums varies.  The price changes based on how long you or your spouse paid Medicare taxes while working:
The Part A  premium is free for most people.  Otherwise, it will either be $278 or $506 in 2023.
The 2023 Part B premium starts at $164.90.  You may also incur a penalty if you don’t purchase Part A when you first become eligible.
You may also choose to purchase Medicare Part C or Part D, or supplemental insurance.
Depending on your income, you may also qualify for assistance with deductibles and copays.
For more information on Medicare costs, please refer to this U.S. Government Website.