Navigating Medicare does not have to feel overwhelming or complicated. Understanding how Parts A, B, C, and D fit together gives you immediate control over your healthcare choices and your retirement budget.
Each lettered part handles specific medical services, ranging from critical inpatient hospital stays and regular doctor visits to specialized prescription drugs and bundled private plans.
This comprehensive guide breaks down the current costs, strict enrollment deadlines, and practical trade-offs so you can evaluate your options and protect your hard-earned savings.
Original Medicare: How Part A and Part B Work Together
Original Medicare consists of Part A and Part B, which the federal government manages directly. You can visit any doctor or hospital nationwide that accepts Medicare assignment without needing a specialist referral.
When a physician accepts assignment, they agree to accept the Medicare-approved amount as full payment. This agreement protects you from surprise charges beyond your standard cost sharing.
Medicare Part A (Hospital Insurance)
Medicare Part A covers inpatient hospital stays, skilled nursing care, hospice care, and limited home healthcare services.
Most Americans qualify for premium-free Part A. You pay a $0 monthly premium if you or your spouse worked and paid Medicare taxes for at least 40 quarters (10 years).
Beneficiaries who must purchase Part A pay up to $565 per month in 2026.
Part A requires a deductible for each benefit period rather than a single annual fee. In 2026, the inpatient hospital deductible is $1,736.
A benefit period begins when you enter a hospital and ends once you have been out for 60 consecutive days. Therefore, you could pay this deductible more than once in a single year.
In 2026, hospital coinsurance costs $0 for days 1 through 60. You pay $434 per day for days 61 through 90.
Beyond 90 days, you pay $868 daily using your lifetime reserve days. Skilled nursing care costs $0 for days 1 through 20 and $217 per day for days 21 through 100.
The Medicare Trustees Report projects the Part A deductible will reach $1,788 in 2027. The Centers for Medicare & Medicaid Services (CMS) finalizes official rates each November.
Medicare Part B (Medical Insurance)
Medicare Part B covers outpatient care, doctor visits, durable medical equipment, and preventive screenings.
In 2026, the standard Part B premium is $202.90 per month, and the annual deductible is $283.
Projections indicate the standard monthly premium will rise to $209.50 in 2027, with an estimated deductible of $292.
After meeting your annual deductible, you typically pay a 20% coinsurance for covered services. Original Medicare has no annual cap on this 20% coinsurance.
High-income beneficiaries pay an extra surcharge known as the Income-Related Monthly Adjustment Amount (IRMAA) on Part B and Part D premiums.
Gaps in Original Medicare
Original Medicare does not cover routine dental exams, vision care, hearing aids, or long-term nursing home custodial care.
Many people buy a private Medicare Supplement Insurance policy, known as Medigap, to pay their deductibles and 20% coinsurance shares.
