Medicare, Explained What to Know as You Approach Age 65

Turning 65 often comes with a long to-do list. Medicare is usually near the top, and for good reason. Your healthcare coverage is changing, and the decisions you make around Medicare can affect not just your medical care, but also your cash flow, tax picture, and overall financial plan. 

If you’re approaching Medicare eligibility and feeling unsure where to start, you’re not alone. My goal here is to help you understand the basics and highlight where Medicare decisions intersect with broader financial planning. 

When Does Medicare Start? 

Most people become eligible for Medicare at age 65. Your initial enrollment window lasts seven months: 

• Three months before the month you turn 65 

• Your birthday month 

• Three months after your birthday month 

From a planning standpoint, timing matters. Enrolling too late can lead to penalties or gaps in coverage, while enrolling too early without understanding your options can lock you into a structure that may not be the best long-term fit. 

The Different Parts of Medicare (in Plain English) 

Medicare is made up of several “parts,” each covering a different type of care. Understanding how they work together is key. 

Part A: Hospital Coverage 
Part A generally covers inpatient hospital stays, skilled nursing care, hospice, and limited home health services. Most people do not pay a monthly premium for Part A because they paid Medicare taxes during their working years. 

Part B: Medical Coverage 
Part B covers outpatient care like doctor visits, lab work, preventive services, and medical equipment. Part B does come with a monthly premium, and higher-income households may pay more. Delaying enrollment without qualifying coverage elsewhere can result in permanent penalties. 

Part C: Medicare Advantage 
Medicare Advantage plans are offered by private insurance companies and bundle Parts A and B together. Many include prescription drug coverage as well. These plans often work like traditional employer insurance, with provider networks and copays. While they can be cost-effective for some, they require careful review, especially if you travel frequently or want flexibility in choosing providers. 

Part D: Prescription Drug Coverage 
Part D helps cover prescription medications and is optional, but often essential. Coverage and costs vary widely by plan, so reviewing how your specific medications are treated is an important step. Skipping Part D when first eligible can result in penalties unless you have other qualifying drug coverage. 

Medigap (Medicare Supplement Insurance) 
Medigap policies are designed to fill in the gaps left by Original Medicare, such as deductibles and coinsurance. These policies work alongside Parts A and B and are not the same as Medicare Advantage. From a planning perspective, Medigap can offer more predictable healthcare costs over time. 

How Do You Enroll in Parts A and B? 

If you are already receiving Social Security benefits before age 65, enrollment in Parts A and B typically happens automatically. 

If not, you’ll need to actively enroll through Social Security. This can be done online or by contacting your local Social Security office. Once enrolled, your Medicare card will be mailed to you. 

Medicare Advantage vs. Medigap: An Important Fork in the Road 

One of the most important Medicare decisions is choosing between Medicare Advantage and Original Medicare paired with a Medigap policy. It’s important to know that this is an either-or choice. You cannot have both at the same time. Medicare Advantage replaces Original Medicare and delivers your coverage through a private insurance plan, often with networks, copays, and bundled benefits. Medigap, on the other hand, works alongside Original Medicare to help cover out-of-pocket costs while allowing broader provider flexibility. From a financial planning perspective, this decision often comes down to trade-offs between cost predictability, provider choice, lifestyle considerations like travel, and how much uncertainty you’re comfortable managing over time. 

Choosing Prescription Coverage and Supplements 

Prescription coverage can be obtained in one of two ways: 

1. A standalone Part D plan paired with Original Medicare 

1. A Medicare Advantage plan that includes drug coverage 

Plans differ significantly, so reviewing how your current medications are covered is an important step. Failing to enroll when first eligible may result in a penalty unless you have other qualifying drug coverage. This is an area where getting guidance can be especially helpful, particularly if you have ongoing prescriptions or specific health needs. 

Timing Matters for Medigap 

Your Medigap open enrollment period lasts six months and begins once you are both: 

• At least 65, and 

• Enrolled in Medicare Part B 

During this window, you generally cannot be denied coverage or charged more due to health conditions. Afterward, acceptance and pricing may depend on underwriting, which can limit options later on. 

Where to Research Your Options 

Medicare’s official website is a helpful starting point for comparing prescription drug plans, Medicare Advantage options, and Medigap policies available in your area. It allows you to review plan features, provider networks, and estimated costs based on your medications. Many people also find it helpful to speak with a licensed insurance professional who specializes in Medicare. An experienced professional can help interpret plan differences, confirm whether prescriptions and providers are covered, and walk through how different choices may affect out-of-pocket costs over time. From a planning perspective, this guidance can be especially valuable when coordinating Medicare decisions with your broader financial plan. 

The Planning Perspective 

Medicare decisions are rarely just healthcare decisions. They intersect with retirement income planning, tax strategy, travel plans, and overall risk management. Taking the time to understand your options, and how they fit into your broader financial picture, can help reduce uncertainty and avoid costly surprises down the road. 

As with many areas of financial planning, the goal isn’t to find a “perfect” answer, but a thoughtful, well-informed one that supports the life you’re building in this next phase. 

A Final Thought 

Medicare decisions are highly personal and often depend on your health history, prescriptions, travel plans, and financial priorities. While the system can feel overwhelming, a thoughtful review of your options can help ensure your coverage aligns with both your healthcare needs and your broader financial plan. 

If you’re approaching Medicare eligibility, this is a great time to step back, review your options carefully, and make informed decisions that support the next phase of your life.