Roth Conversions, Medicare, and Required Minimum Distributions - 332

Do Roth IRA conversions increase Medicare premiums? How can you convert to Roth and stay below the IRMAA threshold (that is, Medicare's Income-Related Monthly Adjustment Amount)? Also, a Roth conversion strategy to account for RMDs, those 5-year rules for withdrawing from your Roth depending on whether you're over or under age 59 and a half, and "how much should I have in a Roth to be in a low tax bracket in retirement?" Financial resources, transcript, Ask Joe & Big Al On Air: https://bit.ly/YMYW-332