The Medicare Annual Enrollment Period runs from October 15 through December 7 every year, and the people who feel best about their coverage decisions are usually not the ones who move fastest. They are the ones who work from a plan. A simple Medicare AEP game plan spreads the work across the fall so that no single week feels heavy, and each step sets up the next one. Here is a week-by-week guide to the whole season, from the letter that lands in your mailbox in September to the day your new coverage begins.
This article is educational only. Medicare.gov and 1-800-MEDICARE are the official sources for complete information on all of your Medicare options.
Why a Medicare AEP Game Plan Helps
Comparing Medicare coverage involves several moving parts at once: monthly premiums, drug formularies, provider networks, deductibles, and out-of-pocket maximums. Trying to weigh all of them in a single sitting is where most of the frustration comes from. Sequencing the work changes that. When you read your plan’s changes first, then take inventory of your medications and doctors, the actual comparison becomes a matter of checking your lists against each plan, not starting from a blank page. That is the whole idea behind the timeline below.
Late September to Early October: Read Your ANOC and Take Inventory
If you are enrolled in a Medicare Advantage or Part D plan, your Annual Notice of Change arrives in September. It spells out exactly what your plan will look like next year: the new premium, changes to copays and deductibles, drugs added to or removed from the formulary, and adjustments to the provider network. Read it with a highlighter. The question to answer is simple: does anything change for the worse in the places where you actually use the plan?
While the ANOC is fresh, build two lists. First, every prescription you take, with the dosage and how often you fill it. Second, every doctor you want to keep, from your primary care physician to specialists and your preferred hospital. In South Florida, where networks can shift noticeably from year to year, these two lists do more work than anything else in the process.
October 15: The Window Opens
On October 15, the Annual Enrollment Period begins. From this date through December 7 you can switch from one Medicare Advantage plan to another, move between Original Medicare and Medicare Advantage, or join, switch, or drop a standalone Part D drug plan. There is no advantage to enrolling on day one; whatever you choose takes effect on January 1 regardless of when in the window you submit it. Use the first stretch of the window to gather plan materials for the new year and to shortlist the two or three options that look worth a closer read.
Late October Through November: Compare the Details
This is the heart of your Medicare AEP game plan, and it breaks into three comparisons. Check drug coverage first: is each of your medications on the plan’s formulary, at what tier, and at which pharmacies? Then verify networks by looking up each doctor on your must-keep list, rather than assuming a large plan includes them. Finally, add up total costs for a realistic year: premium, deductible, the copays you know you will pay, and the out-of-pocket maximum if you have a heavier health year than expected.
If you are weighing Medicare Advantage against Original Medicare with a Medigap policy, treat them as two valid paths rather than a contest with a winner. The right fit depends on how you use care, how you prefer to budget, and which doctors matter to you. This is also a sensible point to bring in help. The licensed Medicare agents at Maher Insurance Group compare plans from multiple A-rated carriers side by side, at no cost to you, and can run your medication and doctor lists through the options in a single conversation.
By Early December: Decide and Enroll
December 7 is the last day of the Annual Enrollment Period, and aiming to enroll by early December simply leaves you breathing room if a question comes up. One rule worth knowing: if you enroll more than once during the window, the last enrollment submitted before December 7 is the one that counts. So if you enroll in November and then find a plan that fits better, you can still change your selection before the window closes, and only the final choice takes effect.
January 1: Your New Coverage Begins
Whatever you selected during the fall starts on January 1. Watch the mail for your new member card and welcome materials, confirm your first prescription fills go through at the pharmacy you expected, and keep your enrollment confirmation somewhere you can find it. If you stayed with your existing plan, the changes described in the ANOC take effect on the same date.
What If You Do Nothing?
Doing nothing is also a decision, and sometimes the right one. If your ANOC shows no meaningful changes and your plan served you well, it generally renews automatically for the new year. The point of a Medicare AEP game plan is not that everyone must switch; it is that whichever way you land, you land there on purpose, with your medications, doctors, and budget checked against the facts for the coming year.
Frequently Asked Questions
When is the Medicare Annual Enrollment Period?
The Annual Enrollment Period runs from October 15 through December 7 every year. It is for people who already have Medicare and want to change their coverage. Any change you make takes effect on January 1 of the following year.
What is the ANOC and when does it arrive?
The Annual Notice of Change is a letter your Medicare Advantage or Part D plan mails each September. It lists exactly what will change in the plan for the coming year, including premiums, copays, the drug formulary, and the provider network.
Does it matter when during AEP I enroll?
Coverage starts January 1 no matter when you enroll between October 15 and December 7, so enrolling on the first day carries no head start. Enrolling with time to spare simply leaves room to gather any documents or answers you still need.
Can I change my mind after I enroll during AEP?
Yes. If you submit more than one enrollment during the Annual Enrollment Period, the last enrollment submitted before December 7 is the one that counts. People enrolled in a Medicare Advantage plan also get one additional change between January 1 and March 31.
Do I have to do anything during AEP if I like my current plan?
No. If your Annual Notice of Change shows no changes that concern you, doing nothing is a valid choice, and your plan generally renews automatically for the new year. Reviewing the ANOC is still worthwhile so the renewal is an informed one.
Put Your Game Plan on the Calendar
A season that feels complicated in the abstract becomes very manageable once it is broken into weeks. If you would like help with any step, from decoding your ANOC to running the final comparison, a licensed agent at Maher Insurance Group can walk through it with you at no cost. Call (866) 220-2834, or if you prefer to start online, fill out our short questionnaire and we will follow up at a time that suits you.
Maher Insurance Group is a licensed independent insurance brokerage and is not affiliated with or endorsed by the U.S. government or the federal Medicare program. We do not offer every plan available in your area. Any information we provide is limited to the plans we do offer. Contact Medicare.gov or 1-800-MEDICARE for information on all of your options.









