As long as you have enough work credits, you can qualify for premium-free Part A coverage. Part B coverage comes with a monthly premium of $164.90 in 2023. If your income is high, your Part B premium could increase as well. You will also be responsible for deductibles, copays, and coinsurance amounts when you receive treatment. Those who decide to sign up for a Medicare Advantage plan will likely have different costs. The insurance companies that manage those plans are allowed to set their own rules about costs, so you would need to contact the insurance company to determine the monthly premium and any cost-sharing amounts.