Medicare, Step by Step from the Beginning

Medicare is the health insurance program run by the U.S. federal government. Most people become eligible at 65, and some qualify earlier — for example, after a disability determination or with certain conditions such as kidney failure requiring dialysis or ALS.

The taxes that came out of your paycheck all those working years were paying into this program. Think of it as insurance you funded, faithfully, for decades. From 65 on, Medicare becomes the foundation of your health coverage.

What each part is, and which ones you need, is covered one at a time below.

Path one — Original Medicare + Medigap. You keep government-run Original Medicare (Parts A + B), add a Medigap (supplement) policy that covers your share of costs, and enroll in a separate Part D drug plan.

Path two — Medicare Advantage (Part C). A private insurance company bundles hospital, medical, and usually drug coverage into one plan, and you receive care within the plan's network of doctors.

Neither path is better for everyone. The right one depends on the doctors you see, the medications you take, and your situation. That is exactly what a consultation looks at — checking, one by one, whether your doctors are in the network and whether your medications are covered.

Medicare enrollment only happens during set windows. Your first window is 7 months long: the 3 months before your 65th-birthday month, your birthday month, and the 3 months after. Most people enroll during this period. For example, if your birthday is in June, your window runs March 1 through September 30.

Apply before your birthday and coverage can start on the 1st of your birthday month; apply after, and it starts later. Whenever possible, apply in the 3 months before your birthday.

The Annual Enrollment Period runs October 15 through December 7 every year. If you already have Medicare, this is when you can switch or add plans, with changes taking effect January 1. Premiums and drug coverage change every year — even if you keep your plan, it is worth a yearly check.

January 1 through March 31 is for Medicare Advantage members only: you can switch to a different Advantage plan or return to Original Medicare, and you can make one change during this window.

If any of the following happens, you may be able to enroll or switch outside the normal windows. In most cases you must act within 2 months of the event.

Part B's premium goes up 10% for every 12 months you were late — and that increase follows you for life. Part D adds a monthly amount for the time you went without drug coverage, for as long as you have Medicare drug coverage.

That said, if you had employer coverage, being late may carry no penalty at all. Spousal employer plans, retiree coverage, and COBRA are each treated differently, so this is worth confirming before you decide anything.

Since earning my California license in 2019, I've worked with Korean-American families across LA County — Koreatown and Downtown — and Orange County. I review where you stand, plan around it, compare plans from multiple carriers, explain the difficult terms in plain language, and help with the paperwork. My office is in Downtown LA.