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Medicare Part D
Prescription Drug Coverage 2027
Medicare Part D Deductible 2027: The $700 Limit Explained
Reviewed by Russell Noga, Licensed Medicare Insurance Broker (all 50 states) — Last updated October 29, 2026
The maximum Medicare Part D deductible for 2027 is $700, up $85 from $615 in 2026. That is a ceiling set by Medicare, not a fixed charge: a plan may set a lower deductible, apply it only to certain drug tiers, or have no deductible at all.
2027 by the Numbers
$700
highest deductible a 2027 Part D plan may charge (CMS)
$615
the 2026 limit it replaces (CMS)
25%
standard coinsurance after the deductible until the cap (CMS)
$2,400
2027 out-of-pocket cap that ends drug costs for the year (CMS)
The deductible is the amount you pay at the pharmacy before your drug plan starts sharing the cost. For 2027 the federal limit climbs to $700, the second increase in a row, and it lands in the same year the premium help that kept many plans cheap goes away. If your prescriptions are mostly brand-name drugs, the deductible is often the first number you will feel in January.
This guide covers how the 2027 deductible works, which drugs usually count toward it, what the bill looks like with real numbers, and how it fits with the other 2027 rules in our Medicare Part D plans 2027 guide. Premiums are covered separately on our Medicare Part D premium 2027 page.
Key Takeaways
- The standard Part D deductible rises to $700 in 2027, from $615 in 2026.
- Plans can charge less than $700, skip the deductible, or apply it only to brand-name and specialty tiers.
- After the deductible you pay up to 25% of the drug cost until your out-of-pocket spending reaches $2,400.
- Covered insulin stays at $35 a month or less and recommended adult vaccines stay at $0, with no deductible.
- Every plan’s 2027 deductible is listed on Medicare Plan Finder and in the plan’s Annual Notice of Change.
What Is the Medicare Part D Deductible for 2027?
Each year CMS sets the most a standard Part D plan can make you pay before coverage kicks in. For the 2027 plan year that limit is $700. Until you have paid that much for covered drugs, you pay the plan’s full negotiated price at the pharmacy. Once you cross it, you move into the initial coverage phase and the plan starts paying most of the bill.
| Part D limit | 2025 | 2026 | 2027 |
|---|---|---|---|
| Maximum deductible | $590 | $615 | $700 |
| Out-of-pocket cap | $2,000 | $2,100 | $2,400 |
| Coinsurance after deductible (standard plan) | 25% | 25% | 25% |
Source: CMS Part D benefit parameters. Plans may offer lower deductibles or copays that are worth at least as much as the standard benefit.
The deductible is tied to the same growth formula that sets the out-of-pocket cap, which is why both moved up together. The $85 jump for 2027 is the biggest one-year rise since the 2025 redesign took effect.
Which Drugs Count Toward the 2027 Deductible?
Only covered drugs on your plan’s formulary count. A drug your plan does not cover, a drug bought outside the plan’s rules, or an over-the-counter medicine does not move you toward the deductible.
Usually exempt from the deductible
✔
Covered insulin, capped at $35 for a month’s supply
✔
Adult vaccines recommended by the CDC’s advisory committee, such as shingles and RSV, at $0
✔
Generic drugs on Tier 1 and Tier 2 in many plans, depending on the plan
✔
Drugs covered under Part B instead of Part D, which follow Part B’s own deductible
Tier rules vary: many plans apply the deductible only to Tier 3, 4 and 5 drugs, so generics start at a copay on day one. Others apply it to every tier. Check the plan’s Summary of Benefits before you assume your generics are covered in January.
What You Pay Before and After the Deductible
1
Deductible phase: you pay the plan’s full price for covered drugs until your payments reach the plan deductible, up to $700.
2
Initial coverage phase: you pay up to 25% of each covered drug’s cost, or the plan’s tier copay, while the plan, the drug maker and Medicare pay the rest.
3
Catastrophic phase: once your own spending reaches $2,400, you pay $0 for covered Part D drugs for the rest of 2027.
Your payments during the deductible phase count toward the $2,400 cap. That means a $700 deductible is never extra money on top of the cap; it is the first $700 of it.
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Our Math: Three 2027 Deductible Examples
We ran the standard 2027 benefit ($700 deductible, 25% coinsurance, $2,400 cap) against three typical drug bills and compared them with the 2026 rules. These assume a plan that uses the full standard deductible on every drug. Our Part D out-of-pocket maximum 2027 page shows when different drug bills reach the cap.
| Monthly drug cost | You pay in 2026 | You pay in 2027 | Change |
|---|---|---|---|
| $100 (one brand drug) | $761.25 | $825.00 | +$63.75 |
| $300 (brand + generics) | $1,361.25 | $1,425.00 | +$63.75 |
| $1,000 (specialty drug) | $2,100.00 (cap reached in July) | $2,400.00 (cap reached in August) | +$300.00 |
Our calculation from CMS 2026 and 2027 standard-benefit parameters; premiums not included. Plans with tier copays or a lower deductible will differ.
What the numbers show: for people who never reach the cap, the higher deductible adds about $64 a year under the standard design. For people on costly drugs, the deductible matters less than the cap, which rises $300.
How the Deductible Hits Your January Budget
Because the deductible resets every January 1, the first one to three months of the year are usually the most expensive at the pharmacy. Someone on a $300-a-month brand drug pays the whole $300 in January and February under a $700 deductible, then a smaller share from March on.
Jan 1
Deductible resets to $0 paid
$700
Most you can owe before coverage starts
$200/mo
Most you would owe monthly with the payment plan if you join in January and hit the $2,400 cap
The Medicare Prescription Payment Plan lets you spread your out-of-pocket drug costs into monthly bills instead of paying them all at the counter. If you used it in 2026 and keep the same plan, you are re-enrolled for 2027 automatically. It does not lower what you owe; it only evens out the timing.
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Ways to Pay Less Than the $700 Deductible
Options to compare during enrollment
✔
Pick a plan with a lower deductible or one that skips the deductible on generic tiers
✔
Look at Medicare Advantage plans with drug coverage, which often have a smaller drug deductible, depending on the plan and area
✔
Apply for Extra Help, which can cut the deductible to $0 for people with limited income and assets
✔
Ask your doctor about a lower-tier generic or a drug with a 2027 negotiated Medicare price
✔
Use a preferred pharmacy in your plan’s network, since the deductible is measured on the plan’s negotiated price
Higher-deductible plan
✔
Often a lower monthly premium
✔
Can work if you take few or only generic drugs
✔
Bigger pharmacy bills early in the year
Low or $0 deductible plan
✔
Usually a higher monthly premium
✔
Copays start in January
✔
Often better for regular brand-name prescriptions
How to Check a Plan's 2027 Deductible
1
Read your Annual Notice of Change. Your current plan mailed it by September 30; it lists the 2027 deductible and which tiers it applies to.
2
Enter your drugs on Medicare Plan Finder. Plan-level 2027 details have been online since October 1 and show your estimated yearly cost, deductible included.
3
Compare total yearly cost, not just the deductible. Add 12 months of premiums to your estimated drug costs; a $0 deductible plan with a high premium can cost more overall.
4
Decide by December 7, 2026. Changes made during Annual Enrollment start January 1, 2027.
Good to know: not every plan is available in every county, and not every plan covers every drug. The plan with the lowest deductible may not cover the medicine you take.
The Medicare Part D formulary 2027 guide explains how tiers decide which drugs the deductible applies to, and the Part D open enrollment 2027 page has the full calendar.
The Bottom Line
The Bottom Line
The 2027 Part D deductible can be as high as $700, but it is a cap, not a price tag, and many plans charge less or exempt generics. Look at your plan’s 2027 deductible, the tiers it applies to and your total yearly cost before December 7, 2026.
We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE (TTY 1-877-486-2048) to get information on all of your options.
Frequently Asked Questions
➤ What is the Medicare Part D deductible for 2027?
The highest deductible a standard Part D plan can charge in 2027 is $700, up from $615 in 2026. Plans can set a lower deductible or none at all.
➤ Do all Part D plans have a $700 deductible in 2027?
No. $700 is the maximum. Some plans charge less, some have no deductible, and many apply it only to brand-name and specialty tiers, depending on the plan.
➤ Does insulin count toward the Part D deductible?
Covered insulin is not subject to the deductible. Your cost is capped at $35 for a month’s supply of each covered insulin product.
➤ Does my Part D premium count toward the deductible?
No. Only what you pay for covered drugs counts toward the deductible and the $2,400 out-of-pocket cap. Monthly premiums are separate.
➤ When does the Part D deductible reset?
It resets on January 1 every year. Money you paid toward your 2026 deductible does not carry over into 2027.
➤ Does a Medicare Advantage plan have a Part D deductible?
Many Medicare Advantage plans with drug coverage have their own drug deductible, often lower than $700 or applied only to certain tiers. Amounts vary by plan and area.
➤ Can Extra Help pay my Part D deductible?
Yes. People who qualify for full Extra Help generally pay no Part D deductible and low fixed copays. You can apply through Social Security.
➤ Do deductible payments count toward the $2,400 cap?
Yes. What you pay during the deductible phase is part of your out-of-pocket spending, so it counts toward the 2027 cap of $2,400.
ZRN Health & Financial Services, LLC, a Texas limited liability company.
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