Each year the Medicare Part B premium, deductible, and coinsurance rates are determined according to the Social Security Act. The standard monthly premium for Medicare Part B enrollees will be $164.90 for 2023, a decrease of $5.20 from $170.10 in 2022. The annual deductible for all Medicare Part B beneficiaries is $226 in 2023, a decrease of $7 from the annual deductible of $233 in 2022.
I see this more as a political move than a practical, justified decision. If no increase was warranted, premium and deductible should remain the same. In this case the premium was lowered by taking from the Part B contingency fund.
It will have negligible benefit for individuals, but will reduce the Part B fund by about $3.5 billion in 2023. If 2024, 2025 total costs are higher than expected, premiums will have to catch-up not from the current premium, but from the lower 2023 premium.