Your 2027 Medicare ANOC Letter: How to Read It
It arrives by September 30 and most people throw it away. It is the single most important piece of Medicare mail you get all year.
By Timothy Jones, licensed independent Medicare agent · · 9 min read
The short answer
Your Annual Notice of Change (ANOC) is a letter your Medicare Advantage or Part D plan must send you by September 30, 2026. It lists exactly how your plan’s costs, drug coverage, and provider network will change in 2027. Check five things: your premium, your drug list, your doctors, your out-of-pocket maximum, and your extra benefits. If something you rely on changed, you can switch during Annual Enrollment, October 15 to December 7, 2026. If you do nothing, your plan renews with all the changes applied.
Every September, a thick envelope shows up from your Medicare plan. It looks like the rest of the insurance mail that arrives all year, so it tends to go straight into the recycling or onto the pile on the counter.
That envelope is different. It is the one document that tells you, in advance and in writing, exactly what your plan is going to do differently next year. And it arrives deliberately: plans must get it to you before Annual Enrollment opens, so you have time to decide whether to stay or go.
What is an ANOC letter?
ANOC stands for Annual Notice of Change. If you are enrolled in a Medicare Advantage plan or a standalone Part D prescription drug plan, your plan is required to send you one every year by September 30.
It is a comparison document. For each part of your coverage it shows what you have this year next to what you will have next year. Nothing in it is a surprise to the plan — these are decisions they already made and filed months ago. The ANOC is simply the moment they have to tell you.
It usually arrives alongside a much thicker book called the Evidence of Coverage, which is the full legal description of your plan. You do not need to read that one cover to cover. You do need to read the ANOC.
The five things to check
You can get what you need out of an ANOC in about fifteen minutes if you know where to look. Work through these in order.
- 01
Your monthly premium
The ANOC shows your 2026 premium next to your 2027 premium. A small change may not be worth switching over. A large one is worth a conversation, especially combined with anything else on this list.
- 02
Your drug list (formulary)
This is the one people miss. A plan can keep your premium identical and still move your medication to a higher cost tier, add a prior-authorization requirement, or drop it entirely. Check every prescription you take by name.
- 03
Your doctors and hospitals
Networks change every year. Confirm your primary care provider, your specialists, and your preferred hospital are still in network for 2027. In Clark County this matters double if you cross into Portland for care.
- 04
Your out-of-pocket maximum
The most you would pay in a bad year. If this number moved up meaningfully, your worst-case exposure grew even if your monthly premium looks the same.
- 05
Extra benefits
Dental, vision, hearing, over-the-counter allowances, fitness and transportation benefits get adjusted quietly. If one of these was the reason you picked the plan, verify it survived into 2027.
If you read only one section, read the drug list
Premium changes are visible and people notice them. Formulary changes are invisible until you are standing at the pharmacy counter in January. Go through your prescriptions one at a time and find each one in the 2027 list. This is where most unpleasant surprises live.
Why 2027 deserves a closer look than usual
Two Medicare-wide numbers are moving next year, and both change the math on prescription coverage.
The standard Part D deductible rises to $700 in 2027, up from $615. The annual out-of-pocket cap on covered prescriptions rises to $2,400, up from $2,100. Both figures come from the CMS Contract Year 2027 Rate Announcement released April 6, 2026, and both are program-wide Medicare parameters rather than the terms of any one plan.
A higher deductible means more of your drug spending happens before your plan starts sharing the cost. That makes which tier your medication sits on matter more in 2027 than it did in 2026. If you take anything expensive, this is the year to actually check. Full detail on the 2027 changes is here.
What to do after you read it
If nothing you rely on changed, you are done. Your plan renews automatically on January 1 and there is no action to take. That is a legitimate outcome and it happens often.
If something did change — a drug moved tiers, a doctor left the network, the out-of-pocket maximum jumped — then you have a window. The Annual Enrollment Period runs October 15 – December 7, 2026. Anything you choose in that window takes effect January 1, 2027.
Miss December 7 and you are generally locked in for the year, unless you qualify for a Special Enrollment Period or you are in a Medicare Advantage plan and use the Medicare Advantage Open Enrollment Period between January 1 and March 31.
Bring your ANOC letter to a no-cost review
Bring the letter and a current list of your prescriptions. We will go through what actually changed and whether it matters for your situation. There is no cost to you, and no obligation to change anything.
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ANOC letter questions, answered
What is a Medicare ANOC letter?+
ANOC stands for Annual Notice of Change. It is a document your Medicare Advantage or Part D plan must mail you every year, showing exactly how your plan's costs, drug coverage, and provider network will change for the coming year compared to the current year.
When does the 2027 ANOC letter arrive?+
Plans are required to deliver your Annual Notice of Change by September 30, 2026 for the 2027 plan year. Most arrive during September. If yours has not arrived by early October, contact your plan directly and request a copy.
What happens if I ignore my ANOC letter?+
Your current plan renews automatically with all of its 2027 changes applied. Nothing stops that from happening. People who skip the ANOC most often discover in January that a prescription moved to a higher tier or a doctor left the network, and by then the Annual Enrollment Period has closed.
Do I need to switch plans if my ANOC shows changes?+
Not necessarily. Changes are normal and every plan has them. What matters is whether the specific changes affect the things you actually use: your prescriptions, your doctors, and your budget. A plan can change quite a bit and still be the right plan for you.
What can I do after I read my ANOC?+
If you want to make a change, the Annual Enrollment Period runs October 15 through December 7, 2026, and anything you choose takes effect January 1, 2027. If you are happy with your plan, you do not need to do anything at all.
Can someone review my ANOC letter with me in Vancouver, WA?+
Yes. Timothy Jones is a licensed independent Medicare agent at 1101 SE Tech Center Dr #140 in Vancouver, WA, serving Clark County and Southwest Washington. Bringing your ANOC letter and your prescription list to a no-cost review is the fastest way to understand what changed. Call (360) 472-4261.
Keep reading
- Medicare in 2027: what changes for Clark County seniors
- How Part D prescription coverage works
- Medicare help in Vancouver, WA
- OEP vs AEP: which enrollment period applies to you
2027 Part D figures verified August 7, 2026 against the CMS Contract Year 2027 Rate Announcement (April 6, 2026). The 2027 Part B premium had not been announced at the time of writing and is expected from CMS in November 2026.
Disclaimer: American Senior Choices 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. Currently we represent 11 organizations which offer 70 products in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options.