Medicare Premiums, Deductibles, and Copays: How They Actually Work

Medicare rarely pays for everything. To understand what you’ll really spend, you need to know how premiums, deductibles, and copays/coinsurance fit together across Parts A, B, C, and D.

Premiums: What You Pay Every Month

A premium is the amount you pay each month to keep your coverage active, whether or not you use any care.

• Medicare Part A (Hospital Insurance)
  Most people don’t pay a premium for Part A because they or a spouse worked and paid Medicare taxes long enough. Some people who don’t meet that work requirement pay a monthly Part A premium.

• Medicare Part B (Medical Insurance)
  Almost everyone pays a monthly Part B premium. There is a standard amount, and people with higher incomes generally pay more through an income-related adjustment.

• Medicare Advantage (Part C) and Part D (Drug Plans)
  These plans are offered by private insurers approved by Medicare.

  • Many Medicare Advantage plans have an additional monthly premium, on top of your Part B premium.
  • Part D prescription drug plans also charge a monthly premium, which varies by plan and coverage.

Deductibles: What You Pay Before Coverage Starts

A deductible is the amount you pay out of pocket each year (or benefit period) before your plan starts paying its share.

• Part A deductible often applies per benefit period, not per year, when you are admitted as an inpatient to a hospital. You pay this amount first, then Medicare Part A begins paying hospital costs for a set number of days.
• Part B has an annual deductible. You must meet it each year before Medicare pays for most doctor visits, tests, and outpatient services.
• Part C and Part D deductibles vary by plan.
  • Some Medicare Advantage plans have a combined medical deductible, or separate medical and drug deductibles.
  • Some Part D plans have a deductible that applies to certain drug tiers, while others may charge no deductible for preferred generics.

Copays and Coinsurance: Your Share Each Time You Get Care

Once you’ve paid your deductible (if one applies), you usually pay a portion of each service cost:

• Copay: A fixed amount, such as a set dollar amount for a primary care visit or a prescription fill.
• Coinsurance: A percentage of the cost, such as a share of a hospital stay or durable medical equipment.

Examples:

• Under Part B, after you meet the deductible, you typically pay a percentage of the Medicare-approved amount for most services.
• Medicare Advantage plans often use fixed copays for office visits and daily copays for hospital stays instead of percentages.
• Part D drug plans may charge copays or coinsurance based on drug tiers (preferred generics, brand-name drugs, specialty drugs, etc.).

How These Costs Work Together

In a typical year you may pay:

• Premiums every month (for Part B, and possibly Part A, C, and D).
• Deductibles when you first start using care for the year or benefit period.
• Copays/coinsurance each time you see a provider, fill a prescription, or stay in the hospital.

Understanding each type of cost—and how they differ by Medicare Part and plan—helps you compare options and estimate your real out-of-pocket spending, not just your monthly premium.