The base premium for Medicare Part B has increased by $21.60 from $148.50 to $170.10. Remember IRMAA (Income Related Monthly Adjustment Amount) higher income earners pay more for Medicare Part B premium and additional for Medicare Part D premium. Why the increase? Each year the Medicare part B premium, deductible and coinsurance rates are determined according to the Social Security Act. Can you get help to reduce the Part B premium? Yes, we may be able to help depending on your zip code. There is no obligation or cost for our services. Click to Set a confidential phone appointment.