Medicare Explained: Which Plan Is Right for You in 2026 (Parts A, B, C, D Simplified)

The Medicare Alphabet: Parts A, B, C, and D

Medicare is the federal health insurance program for people 65 and older (and some younger people with disabilities). It is divided into four parts, each covering different services.

Part A — Hospital Insurance

Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Most people pay $0 for Part A premiums if they or their spouse worked and paid Medicare taxes for at least 10 years. You still pay deductibles and coinsurance.

Part B — Medical Insurance

Part B covers doctor visits, outpatient care, preventive services, and medical equipment. The standard premium in 2026 is $185/month (higher for high earners). You pay 20% of Medicare-approved costs after the $257 annual deductible.

Part C — Medicare Advantage

Part C (Medicare Advantage) is offered by private insurance companies approved by Medicare. It bundles Parts A and B — and usually includes Part D drug coverage and extras like dental, vision, and hearing. Many plans have $0 premiums but higher out-of-pocket costs.

Part D — Prescription Drug Coverage

Part D is optional drug coverage sold by private insurers. Monthly premiums average $35–$55/month. If you do not enroll when first eligible, you pay a permanent late enrollment penalty — so sign up even if you take no prescriptions.

Original Medicare vs Medicare Advantage: The Key Decision

Original Medicare (Parts A + B + Medigap + D) gives you freedom to see any doctor in the US that accepts Medicare — which is most doctors. Medicare Advantage typically has lower premiums but restricts you to a network and requires referrals.

If you travel frequently, have existing specialist relationships, or want maximum flexibility: choose Original Medicare + Medigap. If you are healthy, stay local, and want low premiums with dental/vision included: Medicare Advantage often wins.

When to Enroll — Do Not Miss These Windows

Your Initial Enrollment Period is the 7-month window around your 65th birthday (3 months before, the month of, and 3 months after). Missing it means a 10% permanent premium penalty for every 12-month period you were late on Part B.

The Bottom Line

For most people turning 65, the decision comes down to: do you want flexibility (Original Medicare) or low premiums with extras (Medicare Advantage)? Use Medicare's Plan Finder tool at medicare.gov to compare plans available in your ZIP code.