Medicare Part D
Is Your Prescription Moving Tiers on January 1?
Mount Prospect, Ill. — The envelope usually shows up in late September, and it's easy to set aside. But the Annual Notice of Change (ANOC) your Part D or Medicare Advantage drug plan mails each fall is the single best preview of how your prescriptions will be handled starting January 1. With the Part D out-of-pocket cap on covered drugs rising to $2,400 in 2027 (up from $2,100 in 2026), reading it carefully matters more than usual.
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Will your prescriptions still be covered in 2027?
Part D plans rewrite their drug lists every year — tiers move, pharmacies change, drugs drop off. One call checks your exact medications against the 2027 plans in your area.
- Every prescription checked, name by name
- Your pharmacy checked for preferred pricing
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Key takeaways
- The ANOC arrives by late September and spells out how your plan's drug list, tiers, and rules will change on Jan. 1 — read it before the Oct. 15–Dec. 7 Annual Enrollment Period ends.
- A drug can still be "covered" next year but move to a higher tier, require prior authorization, hit a quantity limit, or need step therapy first.
- The Part D out-of-pocket cap on covered drugs is $2,100 in 2026 and $2,400 in 2027, and the maximum Part D deductible is $615 in 2026 and $700 in 2027.
- If a drug you take is affected, you can compare plans on medicare.gov or call your local SHIP in Cook County for free, unbiased help.
What the ANOC actually is
The ANOC is a plain-language letter from your current plan that compares this year's rules to next year's. It shows changes to the premium, the deductible, the pharmacy network, and — the part most people miss — the drug formulary. If you're enrolled in a stand-alone Part D plan or a Medicare Advantage plan with drug coverage, you should get one by September 30. Keep it with your Evidence of Coverage; you'll want both if you decide to compare plans during the Annual Enrollment Period, which runs October 15 through December 7.
Tiers: same drug, different shelf
Most Part D plans sort covered drugs into tiers, usually five. Lower tiers tend to hold preferred generics; higher tiers hold non-preferred brands and specialty medications. Plans can rearrange those shelves each year. A drug you filled in Tier 2 this year could sit on Tier 3 in January, which typically means a different cost share — even though nothing about the medication itself has changed. The ANOC will flag tier moves for the drugs your plan currently pays for.
Utilization management: prior authorization, quantity limits, step therapy
Beyond tiers, plans use "utilization management" tools that decide how a covered drug gets filled:
- Prior authorization (PA): Your doctor has to send the plan clinical information before the pharmacy can fill it.
- Quantity limits (QL): The plan will only cover a set amount per fill or per month.
- Step therapy (ST): The plan asks you to try a preferred alternative first; if that doesn't work, it will cover the drug you and your doctor originally wanted.
These rules can be added, removed, or tightened from one year to the next. A drug that filled with no questions in 2026 could require a PA in 2027, and vice versa.
How to read your ANOC in about 15 minutes
Pull out the letter and a list of every prescription you take. Then:
1. Find the section labeled something like "Changes to our drug list" or "Formulary changes." 2. For each of your drugs, note the 2027 tier and any letters next to it — commonly PA, QL, or ST. 3. Check the deductible and any changes to the pharmacy network, including mail order and preferred pharmacies. 4. If a drug you rely on is being dropped or moved to a much higher tier, flag it. That's your cue to either talk to your prescriber or shop plans.
If you're new to a plan and a drug you take isn't covered the way it used to be, ask about a transition fill — Part D plans are generally required to provide a temporary supply while you and your doctor work out next steps or file an exception.
The 2027 backdrop
A few program-level facts to keep in mind as you read:
- Part D out-of-pocket costs for covered drugs are capped at $2,100 in 2026.
- The maximum Part D deductible is $615; individual plans may set theirs lower.
- The old coverage gap ("donut hole") is gone as of 2025 — Part D now has three phases.
- The Medicare Prescription Payment Plan lets you spread your drug costs across the calendar year in monthly bills instead of paying at the pharmacy counter.
- IRMAA surcharges on Part B and Part D premiums start above $109,000 in income for a single filer in 2026.
Where Mount Prospect readers can get help
Mount Prospect is in Cook County, where 58 Medicare Advantage plans from 11 carriers are offered for 2027 — enough that comparing them by hand isn't realistic. The Plan Finder at medicare.gov lets you enter your prescriptions and see how each plan would handle them next year, including tier and utilization rules. For one-on-one help at no cost, contact Illinois SHIP (Senior Health Insurance Program) through the Illinois Department on Aging, or call 1-800-MEDICARE (1-800-633-4227), available 24/7.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
By the numbers
How people get Medicare in Cook County
(MA penetration in Cook County)
MA penetration from CMS enrollment data; Medigap share is an estimate. U.S. average is about 54% Medicare Advantage. These are area-level figures, not plan-specific.
Key dates
Medicare enrollment periods at a glance
- Around your 65thInitial Enrollment PeriodA 7-month window around the month you turn 65 — your first chance to sign up.
- October 15 – December 7Annual Enrollment PeriodAnyone with Medicare can join, switch, or drop a Medicare Advantage or Part D plan.
- January 1 – March 31Medicare Advantage Open EnrollmentIf you're already in a Medicare Advantage plan, you can make one change.
- January 1 – March 31General Enrollment PeriodFor people who missed their first chance to sign up for Part B.
- VariesSpecial Enrollment PeriodTriggered by life events like moving or losing other coverage.
Dates are set by Medicare and apply nationwide. Confirm your personal windows at Medicare.gov or 1-800-MEDICARE.
Try it
How the 2026 Part D drug cap works
Slide to your estimated yearly prescription costs and see how the new $2,100 out-of-pocket cap protects you. This illustrates the standard Part D benefit; your plan may structure costs differently.
Once your out-of-pocket spending on covered drugs reaches $2,100, you pay nothing more for the rest of 2026. Confirm details at Medicare.gov.
Explore
When can you enroll? An interactive year
Enrollment windows are federal and the same nationwide. Confirm your personal dates at Medicare.gov or 1-800-MEDICARE.
Good to know
Frequently asked questions
When will my ANOC arrive?
My drug is still on the formulary. Why does my pharmacy say it needs approval now?
Can I switch plans if I don't like the changes?
What if my doctor believes I need the original drug, not the alternative?
- CMS — Medicare Part D program rules (medicare.gov)
- CMS — Medicare enrollment periods (medicare.gov)
For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.
Also for Mount Prospect
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This page was last updated: October 6, 2026.