Turning 65 often comes with plenty of planning. You may be thinking about retirement, adjusting your household budget or deciding whether to continue working. Medicare adds another important decision to that list. With different parts, enrollment periods and coverage choices, waiting until the last minute can make the process feel unnecessarily complicated.  

1. Know when your enrollment window begins

For most people, Medicare eligibility begins around age 65. Your Initial Enrollment Period generally lasts seven months, beginning three months before the month you turn 65, including your birthday month and continuing for three months afterward. Enrolling early can help prevent delays in coverage. Some people who already receive Social Security benefits are enrolled automatically, while others need to sign up themselves.  

2. Understand what Parts A and B cover

Medicare Part A generally covers inpatient hospital care and certain other facility-based services, while Part B helps cover physician visits, outpatient care, preventive services and medical equipment. Together, they form Original Medicare. However, Original Medicare does not cover every healthcare expense, so it is important to understand deductibles, coinsurance and services that may require additional coverage before deciding how your healthcare budget will work.

3. Compare Original Medicare and Medicare Advantage

Once you have Parts A and B, you generally have two main ways to receive Medicare benefits. You can stay with Original Medicare and potentially add a Part D prescription drug plan and Medigap coverage, or you can choose a Medicare Advantage plan offered by a private insurer. Medicare Advantage plans usually combine Parts A and B and often Part D, but provider networks and out-of-pocket costs can differ.  

4. Review your prescription medications

Even if you currently take only a few medications, prescription coverage deserves attention. Part D plans have different formularies, pharmacy networks and costs, so make a list of your prescriptions before comparing plans. If you go 63 days or more without Medicare drug coverage or other creditable prescription coverage after becoming eligible, you may face a Part D late enrollment penalty later.

5. Coordinate Medicare with employer coverage

Turning 65 does not always mean you should immediately leave an employer health plan. If you or your spouse are still working and have coverage through current employment, different enrollment rules may apply. Speak with the employer benefits administrator before delaying Part B because not every type of coverage qualifies for a Special Enrollment Period. Delaying incorrectly can lead to gaps or a Part B late enrollment penalty.

6. Pay attention if you contribute to an HSA

Once you are enrolled in Medicare, you can no longer contribute to a Health Savings Account. This requires extra planning because premium-free Part A can sometimes begin retroactively when someone enrolls after age 65.  

Preparing for Medicare is easier when you approach it one decision at a time. Review your enrollment dates, current coverage, doctors, prescriptions and expected healthcare expenses several months before turning 65. A licensed Medicare professional or State Health Insurance Assistance Program counselor can also help explain your choices. Starting early gives you more time to choose coverage that fits both your healthcare needs and retirement budget.