The standard monthly Part B premium rate for 2010 is $110.50, which is equal to 50 percent of the monthly actuarial rate for aged enrollees or roughly 25 percent of the expected average total cost of Part B coverage for aged enrollees. (The 2009 standard premium rate was $96.40.) The Part B deductible for 2010 is $155.00 for all Part B beneficiaries.

A beneficiary who has to pay an income-related monthly adjustment may have to pay a total monthly premium of roughly 35, 50, 65 or 80 percent of the total cost of Part B coverage.

DATES: Effective Date: January 1, 2010.