Medicare Part B Premiums Increase 2025. The 2025 irmaa surcharge amounts for part b will added on top of the basic part b premium of $185.00, an increase of $10.60 from 2024. The premium was $164.90 in 2023.

The annual deductible for all medicare part b beneficiaries will. The standard monthly premium for medicare part b enrollees will rise by $10.30 to $185.00 in 2025 from $174.70 this year, cms said late friday.