Just released on Medicare.gov, see the 2019-2020 Medicare Costs at a Glance, featuring basic costs for people with Medicare.

Listed below are basic costs for people with Medicare. If you want to see and compare costs for specific health care plans, visit the Medicare Plan Finder.

For specific cost information (like whether you've met your deductible, how much you'll pay for an item or service you got, or the status of a claim), visit MyMedicare.gov. 

Find out if Medicare covers a specific test, item or service that's not listed under the detailed Medicare cost information section of this page.

2019 & 2020 Costs at a Glance

Part A premium:

Most people don't pay a monthly premium for Part A (sometimes called "premium-free Part A"). If you buy Part A, you'll pay up to $437 each month in 2019 ($458 in 2020). If you paid Medicare taxes for less than 30 quarters, the standard Part A premium is $437 ($458 in 2020). If you paid Medicare taxes for 30-39 quarters, the standard Part A premium is $240 ($252 in 2020).

Part A hospital inpatient deductible and coinsurance

You pay:$1,364 ($1,408 in 2020) deductible for each benefit periodDays 1-60: $0 coinsurance for each benefit periodDays 61-90: $341 ($352 in 2020) coinsurance per day of each benefit periodDays 91 and beyond: $682 ($704 in 2020) coinsurance per each "lifetime reserve day" after day 90 for each benefit period (up to 60 days over your lifetime)Beyond lifetime reserve days: all costs

Part B premium

The standard Part B premium amount is $135.50 ($144.60 in 2020) (or higher depending on your income).

Part B deductible and coinsurance

$185 ($198 in 2020). After your deductible is met, you typically pay 20% of the Medicare-approved amount for most doctor services (including most doctor services while you're a hospital inpatient), outpatient therapy, and durable medical equipment (dme)

Part C premium

The Part C monthly  premium varies by plan.Compare costs for specific Part C plans.

Part D premium

The Part D monthly premium  varies by plan (higher-income consumers may pay more).Compare costs for specific Part D plans.

Source: https://www.medicare.gov/index.php/your-medicare-costs/medicare-costs-at-a-glance
https://www.medicarefaq.com/original-medicare/medicare-costs/