Why Understanding Medicare Saves You Money
Medicare isn't a single plan — it's a system of parts that work together. Choosing the wrong combination, or missing enrollment windows, can lead to unnecessary costs or gaps in coverage. Taking a few hours to understand how it all fits together is one of the best financial moves a new retiree can make.
Medicare Part A: Hospital Insurance
Part A covers inpatient hospital stays, skilled nursing facility care (following a qualifying hospital stay), hospice, and some home health services.
- Cost: Most people pay $0 in premiums for Part A if they or their spouse worked and paid Medicare taxes for at least 10 years.
- Deductible: There is a per-benefit-period deductible for hospital stays (the amount adjusts each year).
- Important note: Part A does not cover long-term custodial nursing home care.
Medicare Part B: Medical Insurance
Part B covers outpatient services: doctor visits, preventive care, lab tests, durable medical equipment, and some home health services.
- Cost: Most enrollees pay a standard monthly premium (set annually by CMS). Higher earners pay more through Income-Related Monthly Adjustment Amounts, or IRMAA.
- Deductible & Coinsurance: There is an annual deductible, and after that, Medicare typically pays 80% of approved costs — leaving you responsible for 20%.
- Enrollment tip: Missing your Initial Enrollment Period can trigger a late enrollment penalty that lasts for life.
Medicare Part C: Medicare Advantage
Part C (Medicare Advantage) is an alternative way to receive your Medicare benefits. Private insurance companies, approved by Medicare, bundle Part A and Part B — and usually Part D — into a single plan.
- Plans often include extras like dental, vision, and hearing coverage.
- They typically use provider networks (HMO or PPO structures), which limits your choice of doctors.
- Monthly premiums may be lower than Original Medicare + a Medigap supplement, but out-of-pocket costs can be higher when you use services heavily.
Medicare Part D: Prescription Drug Coverage
Part D adds prescription drug coverage to Original Medicare (Parts A & B). You purchase a standalone Part D plan from a private insurer.
- Plans vary widely in which drugs they cover (the formulary) and what you pay.
- Compare plans each year during Open Enrollment (October 15 – December 7) because formularies and costs change annually.
- Low-income enrollees may qualify for the Extra Help program, which significantly reduces drug costs.
Original Medicare vs. Medicare Advantage: A Quick Comparison
| Feature | Original Medicare (A+B) | Medicare Advantage (Part C) |
|---|---|---|
| Provider choice | Any Medicare-accepting provider nationwide | Usually limited to plan's network |
| Referrals needed | No | Often yes (HMO plans) |
| Dental/Vision/Hearing | Not covered | Often included |
| Out-of-pocket maximum | No cap (Medigap helps) | Annual cap required by law |
| Drug coverage | Separate Part D plan needed | Usually bundled |
What About Medigap (Medicare Supplement)?
If you choose Original Medicare, a Medigap policy from a private insurer can cover many of the gaps — like the 20% coinsurance under Part B. Medigap plans are standardized by letter (Plan G is one of the most popular), but premiums vary by insurer and location. You generally cannot have both Medigap and a Medicare Advantage plan at the same time.
Where to Get Help
Every state has a free State Health Insurance Assistance Program (SHIP) that provides one-on-one counseling to help you compare plans. Visit shiphelp.org to find your local counselor.