If you are enrolled in a Medicare Advantage plan or a stand-alone Part D drug plan, a notice that could reshape your 2027 health costs should reach your mailbox or inbox within days. Plans must send their Annual Notice of Change, known as the ANOC, by September 30, spelling out what will be different in premiums, drug coverage, and provider networks starting January 1.
This year the letter carries more weight than usual. Federal regulators are ending a temporary program that held down premiums for stand-alone drug plans in 2025 and 2026, and the Centers for Medicare & Medicaid Services has said it will publish final 2027 plan premiums with its plan landscape in September.
Medicare open enrollment runs from October 15 through December 7. People who set the notice aside and do nothing generally stay in the same plan, whatever it will cost or cover next year.
A Short Letter with Long-Term Costs
According to the National Council on Aging, the ANOC arrives by mail or email, depending on the option you chose, and should also be available on your plan's website. If it has not arrived by the end of September, the council advises contacting the plan right away. A longer Evidence of Coverage document explains your full benefits and rights.
The notice summarizes how next year's plan will differ from this year's. The items that most often cause surprises are the monthly premium, the annual deductible, and the drug list, known as a formulary. A medication can stay covered but move to a more expensive tier, pick up a new restriction such as prior authorization, or drop off the list entirely.
Medicare Advantage members should also check whether their doctors, specialists, and preferred hospitals remain in network. Pharmacy networks matter for drug plans too, because a plan may charge less at preferred pharmacies.
Several federal limits change in 2027. The maximum standard Part D deductible rises to $700 from $615, and the annual out-of-pocket cap on covered Part D drugs rises to $2,400 from $2,100, under CMS's 2027 payment policy announcement. The $35 monthly cost-sharing limit for covered insulin continues.
Premium Relief Ends for Stand-Alone Drug Plans
On July 28, CMS said it would end the Part D Premium Stabilization Demonstration after 2026. In a CMS fact sheet on 2027 Part D bids, the agency said plan sponsors had "sufficient experience under the redesigned Part D benefit" to support their bid assumptions. The change returns stand-alone drug plans to what CMS called traditional market conditions.
CMS set the 2027 national average monthly bid amount at $296.05 and the base beneficiary premium at $41.33, up from $38.99 in 2026. That base figure is a starting point in the premium formula, not a bill, and its 6% annual growth cap does not limit what an individual plan charges.
CMS officials estimated the demonstration would cost $9.8 billion across 2025 and 2026, according to a Government Accountability Office report cited by Becker's Payer Issues. The number of stand-alone drug plans also fell to 360 nationwide in 2026 from 464 in 2025, according to KFF data cited in the same report.
Estimates of the impact differ. CMS Administrator Dr. Mehmet Oz said most people would see increases of less than $10 a month, with some seeing lower premiums, Healthcare Dive reported. Outside analysts are more cautious. An Avalere Health analysis cited by AARP said the program's end adds upward pressure on stand-alone plan premiums for 2027. The demonstration applied to stand-alone plans, not Medicare Advantage plans that include drug coverage.
Auto-Renewal Can Lock In a Costly Plan
Many beneficiaries never compare plans. KFF research has found that roughly seven in 10 people with Medicare did not compare coverage options during a recent open enrollment period. That habit can be expensive when a plan's formulary or network changes quietly.
Timing matters as well. After December 7, stand-alone Part D enrollees generally cannot switch until the next fall unless they qualify for a special enrollment period. Medicare Advantage members get one more chance to switch plans or return to Original Medicare from January 1 through March 31.
If a plan is leaving your area, members receive a separate nonrenewal notice and should not assume a replacement will be automatic.
People with limited income and savings may qualify for Extra Help, which lowers Part D premiums and copays. Applications go through the Social Security Administration.
Five Checks to Finish Before October 15
First, write down every prescription, with the dose and how often you refill it. Second, compare that list against the new formulary described in your ANOC, looking for tier changes and new prior authorization rules.
Third, confirm that your primary care doctor, specialists, and hospital remain in network for 2027. Fourth, once CMS publishes its 2027 plan landscape, use the plan comparison tool at Medicare.gov to price your current plan against others in your ZIP code. Fifth, if the choices feel overwhelming, contact your State Health Insurance Assistance Program for free, unbiased counseling, or call 1-800-MEDICARE.
Be cautious with unsolicited calls or ads promising extra benefits. Official plan information comes from your plan, Medicare.gov, or 1-800-MEDICARE.
Until final premiums are published, your ANOC is the most specific preview of what your own coverage will cost next year, and the best reason to open the envelope this week.
Key Questions Answered
What is the Annual Notice of Change? It is a notice from your Medicare Advantage or Part D plan that summarizes changes to costs, covered drugs, and networks for the coming year.
When should it arrive? Plans must send it by September 30. If you have not received it, contact your plan.
What should I check first? Your premium, your deductible, whether each of your drugs is still covered and at what tier, and whether your doctors and pharmacies remain in network.
Why does 2027 matter more than usual? CMS is ending a temporary program that lowered stand-alone Part D premiums in 2025 and 2026, so some premiums may rise.
When is Medicare open enrollment? October 15 through December 7, 2026, with changes taking effect January 1, 2027.
What if I do nothing? You generally stay in the same plan, even if its costs or coverage change.
Where can I get free help? Your State Health Insurance Assistance Program offers free counseling, and 1-800-MEDICARE can answer questions.
Published by Medicaldaily.com
