Medical Expense✓ Verified · outline & fact-checked · Sep 2026Difficulty 1/5
Regarding Medicare Part B monthly premiums:
Select an option to reveal the answer and the full 3-part explanation — free, no signup.
Answer & full 3-part explanation (select an option above, or peek)
Why A is correct
Most Part B beneficiaries pay a standard monthly premium, but the law imposes income-related monthly adjustment amounts (IRMAA) on higher-income beneficiaries. Their premiums are scaled upward based on modified adjusted gross income and tax-filing status, as determined by Social Security. This income-graded structure is a distinguishing feature of Part B financing.
Why the other options are wrong
- B) Premiums are not flat for everyone; high-income beneficiaries pay more under the income-related adjustment.
- C) Premiums are set federally and do not vary by state of residence.
- D) All Part B enrollees pay premiums, not only those over age 85.
Memory hook
Higher income, higher Part B premium — that is the IRMAA way.