This article is educational only. It does not recommend any plan or company. For decisions about your own coverage, use the official resources listed at the end: Medicare.gov, 1-800-MEDICARE, and your local SHIP counselor.

Every autumn, if you or someone you help care for is on Medicare, the mailbox fills up. Some of those envelopes are official documents you genuinely need to read. Many more are advertisements engineered to look like official documents. Sorting one from the other is half the job — so let's translate the pile.

The dates that anchor everything: Medicare's Annual Enrollment Period (also called Fall Open Enrollment) runs October 15 through December 7 every year, and changes you make take effect January 1, according to CMS. That window is when people with Medicare can review and change how they receive coverage for the following year. The fall mail exists because of it.

The ANOC: the one letter you should actually read

If you're in a Medicare Advantage plan or a standalone Part D prescription drug plan, your plan sends you an Annual Notice of Change (ANOC) — typically by September 30, before enrollment opens.

This is the important one, and it's the one most likely to go straight into the recycling because it looks like boilerplate. It isn't. The ANOC lists, side by side, what your plan costs and covers this year versus what it will cost and cover next year: premium, deductible, copays, the drug formulary, provider network, and service area.

The quiet trap of Medicare Advantage and Part D plans is that doing nothing is itself a decision. If you take no action during the enrollment window, you're re-enrolled in your plan as modified — including every change in that letter.

The quiet trap of Medicare Advantage and Part D plans is that doing nothing is itself a decision.

When you read the ANOC, look specifically for:

  • Premium and deductible changes — the headline numbers, but not the whole story
  • Your actual medications — is each one still on the formulary, and at the same tier and copay?
  • Your actual doctors and hospital — still in network next year?
  • Benefit changes — dental, vision, hearing, and other extras can shrink or vanish year to year
  • Service area — occasionally plans stop operating in a county entirely; the letter will say so

If everything still fits your life, doing nothing is a perfectly fine choice — but make it a choice.

The rest of the official pile

The fall mail stack, decoded one letter at a time
The fall mail stack, decoded one letter at a time.
  • Evidence of Coverage (EOC). The full legal description of next year's plan — the ANOC is the summary of changes; the EOC is the complete rulebook. Keep it; you'll want it if a claim gets complicated.
  • "Medicare & You" handbook. The government's own annual guide, mailed in the fall and available at Medicare.gov. It explains what Medicare covers and how the parts fit together. It is the one thing in the pile with nothing to sell you.
  • Part D creditable-coverage notices. If you have drug coverage through an employer or union, you'll get a notice saying whether that coverage counts as "creditable" (as good as standard Part D). File it — it matters for avoiding late-enrollment penalties if your situation changes.

The mail that only looks official

Here's where a skeptical eye earns its keep. Private insurers are allowed to market during the fall, and much of that marketing borrows the visual language of government mail: eagles, flags, "important plan information," faux-urgent deadlines.

A few translation rules:

  • Genuine government mail comes from Medicare, CMS, or Social Security — and Medicare will not call or visit you uninvited to sell you anything. Unexpected calls asking for your Medicare number are a scam; guidance and fraud reporting live at Medicare.gov's fraud pages and 1-800-MEDICARE.
  • "Final notice" and "act now" framing on plan mail is marketing, not law. The only real deadline is the enrollment window itself, and it's the same for everyone: October 15 to December 7.
  • An invitation to a "free educational seminar" is frequently a sales event. Nothing wrong with attending one — just know what room you're walking into.

No legitimate caller needs your Medicare number, Social Security number, or bank information to "verify" or "update" your file. Treat your Medicare number like a credit card number. If a call feels official and urgent, hang up and dial 1-800-MEDICARE (1-800-633-4227) yourself — if something genuinely concerns your account, they'll know.

How to actually compare, without a salesperson

If the ANOC gives you a reason to look around — a dropped drug, a departed doctor, a jump in costs — the comparison tools that don't profit from your choice are:

  • Medicare.gov's Plan Finder — enter your medications and pharmacy and it estimates your total yearly cost (premiums plus drug costs) under each available plan. Total yearly cost is the number that matters; a low premium can hide high copays.
  • 1-800-MEDICARE (1-800-633-4227) — the official help line, available 24/7.
  • Your State Health Insurance Assistance Program (SHIP) — free, unbiased, one-on-one Medicare counseling from trained counselors, with no connection to any insurance company. Every state has one; find yours at shiphelp.org or by calling 877-839-2675. During the fall window, SHIP counselors will literally sit with you and walk through your options — at no cost.

That last resource is the most underused item in this entire article. A licensed insurance agent can be helpful, but an agent is typically paid by the plans they sell. A SHIP counselor is paid by nobody with a horse in the race.

The five-line version

Ignore the decorated envelopes. Read the ANOC when it arrives in September. Check your drugs, your doctors, and the total costs against next year's terms. If anything changed in a way that hurts, compare alternatives on Medicare.gov or with a SHIP counselor between October 15 and December 7. And make whatever you do — including nothing — a decision you actually made.