The 2017 Medicare Part B (physicians and related services) premium is $109 a month for most enrollees, an increase of about $4. Due to the small 0.3 percent COLA in Social Security, under a “hold harmless” provision, certain enrollees will pay more, $134 a month, an increase of about $12. That group includes new enrollees for 2017 and those who don’t pay Medicare premiums from Social Security (meaning most of those retired under CSRS). Those with annual taxable incomes above $85,000 for single filers and $170,000 for joint filers also pay the basic Part B premium at the higher rate plus surcharges that will range from $53.50 to $294.60 a month. The Part B annual deductible will rise from $166 to $183 for all enrollees.