Turning 65 in Arizona? Here Is What You Need to Know Before Medicare Begins

Becoming eligible for Medicare is one of the most consequential decisions you will make about your health coverage — and most people have no idea where to begin. I work with first-time Medicare enrollees across Tucson and Pima County every day, and I can walk you through every step before your enrollment window opens.

Medicare comes with firm deadlines and permanent consequences for missing them. The good news is that when you understand how the timeline works and what decisions you actually face, the process is far more manageable than it first appears.

Still Working at 65? The Part B Delay Question Has a Real Answer

One of the most common questions I hear from people approaching Medicare eligibility is whether they need to sign up at 65 if they are still covered through an employer. The answer depends on specifics — and getting it wrong in either direction has real consequences.

If you are covered through an active employer plan and your employer has 20 or more employees, you generally have the option to delay Part B without penalty. When that employer coverage ends, you qualify for a Special Enrollment Period that gives you 8 months to enroll in Part B without a late penalty. However, if your employer has fewer than 20 employees, Medicare becomes your primary coverage at 65 regardless of the group plan — and delaying Part B in that situation would leave you underinsured.

The decision also comes down to cost. Sometimes employer coverage is rich enough that delaying Medicare makes financial sense. Other times, enrolling in Medicare and dropping the employer plan saves money immediately. I can look at your specific situation — your plan, your employer size, your prescriptions, and your expected out-of-pocket costs — and give you a clear recommendation.

What Medicare Actually Covers — and What It Does Not

Understanding the structure of Medicare before you enroll helps you choose the right coverage from the start. Original Medicare has four parts, each covering a distinct category of care.

• Part A covers inpatient hospital stays, skilled nursing facility care, hospice, and some home health services. Most people do not pay a premium for Part A if they or their spouse worked and paid Medicare taxes for at least 10 years.
• Part B covers outpatient care, doctor visits, preventive services, and durable medical equipment. Part B carries a monthly premium, which is income-adjusted.
• Part C (Medicare Advantage) is an alternative to Original Medicare offered through private insurers. These plans bundle Part A and Part B coverage and often include prescription drug, dental, vision, and hearing benefits.
• Part D covers prescription drugs. It is available as a standalone plan alongside Original Medicare or built into a Medicare Advantage plan.

Original Medicare does not cover most dental, vision, hearing, or long-term care services. Understanding those gaps before you enroll shapes which supplemental coverage makes sense for your situation.

The Three Decisions Every First-Time Enrollee Faces

Once you understand the structure of Medicare, you face three decisions that shape your coverage for years to come. Getting clear on each one before your Initial Enrollment Period closes is the goal.

Original Medicare or Medicare Advantage?

Original Medicare (Parts A and B) gives you broad access to providers nationwide and pairs with a Medicare Supplement plan to cover most out-of-pocket costs. Medicare Advantage bundles your coverage into a single private plan, often with lower premiums and added benefits, but typically within a defined network. The right choice depends on your health, your providers, your prescription needs, and how much you travel. I help people in Tucson and across Pima County think through this comparison every enrollment season.

Do You Need a Medicare Supplement Plan?

If you choose Original Medicare, a Medicare Supplement(Medigap) plan covers costs that Medicare does not — including copayments, coinsurance, and the Part A deductible. Medigap plans are standardized by the federal government, which means Plan G from one carrier covers exactly the same benefits as Plan G from another. The differences come down to premium pricing and carrier stability. Enrollment timing matters here too: you have a guaranteed-issue window when you first enroll in Part B, and missing it can mean medical underwriting later.

Which Part D Plan Covers Your Prescriptions?

Part D plans vary significantly in which drugs they cover, what tier those drugs fall on, and what your monthly premium and out-of-pocket costs will be. The right plan is the one that covers your specific medications at the lowest total annual cost — not necessarily the plan with the lowest premium. I run prescription comparisons for clients to identify the plan that actually fits their drug list.

What About Dental, Vision, and Hearing?

Original Medicare does not cover routine dental, vision, or hearing care. Some Medicare Advantage plans include these benefits, and standalone dental, vision, and hearing plans are also available. If you are choosing Original Medicare with a Medigap plan, budgeting for separate supplemental coverage in these categories is worth planning for before your first enrollment period closes.