Does Medicare cover Lantus in Oregon?

What Lantus is used for

Lantus is a long-acting insulin injected once a day. Its FDA label covers improving blood sugar control in adults and children with type 1 diabetes and adults with type 2 diabetes.

This page explains Medicare coverage only. Questions about whether Lantus is right for you belong with your prescriber.

Which part of Medicare covers Lantus

Lantus comes in vials and SoloStar pens that you inject yourself, so it's a Part D drug. Part B covers insulin only when it's used with an insulin pump covered as durable medical equipment, and the same monthly cap applies there, with no Part B deductible. Long-acting insulin like Lantus isn't used in a pump.

Is Lantus on Medicare's negotiated-price list?

Lantus is not among the drugs CMS has selected for the Medicare Drug Price Negotiation Program so far (the 10 drugs with negotiated prices for 2026, the 15 for 2027 and the 15 selected in January 2026 for 2028).

Generics and biosimilars

FDA has licensed biosimilars to Lantus, including Semglee (insulin glargine-yfgn), the first interchangeable biosimilar insulin, approved in July 2021, and Rezvoglar (insulin glargine-aglr). An interchangeable biosimilar can be substituted at the pharmacy where state law allows. A plan may cover a biosimilar or unbranded insulin glargine instead of Lantus; the monthly cap applies to whichever covered insulin you get.

How the insulin cap works

• The cap is $35 for each one-month supply of each covered insulin, and the Part D deductible doesn't apply.
• If you fill a two- or three-month supply, the cap is applied for each month in the fill.
• The cap applies to insulins on your plan's formulary. If your plan doesn't cover Lantus, ask whether it covers another insulin glargine, or request an exception.
• Extra Help can make your insulin copay even lower.

What you pay for Lantus in 2027: the out-of-pocket cap

Your cost for Lantus depends on your plan: its deductible, the tier it puts the drug on, and whether you use a preferred pharmacy. This site doesn't list plan costs; your plan's formulary and Evidence of Coverage do. What Medicare sets for everyone with Part D is the limit:

• 2027 out-of-pocket cap: $2,400 (it was $2,100 in 2026). Once what you pay for covered Part D drugs (deductible, copays and coinsurance) reaches the cap, you pay nothing more for covered Part D drugs for the rest of 2027.
• The maximum Part D deductible for 2027 is $700. No plan can set a higher deductible.
• Only covered drugs count. If your plan doesn't cover Lantus and you pay cash, or you use a discount card instead of your plan, that spending doesn't count toward the cap.

Spreading the cost: the Medicare Prescription Payment Plan

The Medicare Prescription Payment Plan lets you pay your Part D drug costs in monthly bills from your plan across the calendar year instead of all at once at the pharmacy. Medicare.gov says there's no cost to participate, but it doesn't lower your drug costs; it only changes when you pay. It helps most when costs are high early in the year. To join, call your plan or use its website. More in What is the Medicare Prescription Payment Plan?

Extra Help with Lantus

Extra Help (the Low-Income Subsidy) is a federal program that lowers Part D premiums, deductibles and copays. For 2027, CMS caps Extra Help copays for covered drugs at $5.80 for a generic and $14.40 for a brand-name drug, and some people with full Medicaid pay less. You get Extra Help automatically if you have OHP (Medicaid), a Medicare Savings Program or SSI; otherwise apply through Social Security at 1-800-772-1213 or ssa.gov/extrahelp. See Extra Help in Oregon.

Getting Lantus covered in Oregon

Oregon and Washington share Part D region 30, so standalone Part D plans are offered region-wide. For 2027, Oregon has 8 standalone Part D plans from 4 companies, plus Medicare Advantage plans with drug coverage in most counties (61 open to everyone statewide). Each plan has its own formulary, so one plan's coverage of Lantus tells you nothing about another's.

Where you live in Oregon changes your choices. CMS data show no Medicare Advantage plan open to everyone in Grant, Harney, Lake, Umatilla or Union counties for 2027 (only employer group plans), and only a special needs plan in Curry County. If you live there, coverage for Lantus usually comes from a standalone Part D plan alongside Original Medicare, unless you have employer or other drug coverage. Check your county's numbers on Oregon counties.

If you have both Medicare and OHP, OHP doesn't pay for drugs that Part D covers. The Oregon Health Authority calls this "OHP with Limited Drug": you need a Part D plan (or a Medicare Advantage plan with drug coverage) for Lantus, and you qualify for Extra Help automatically. See OHP and Medicare.

Oregon law also lets a pharmacist dispense emergency insulin and supplies if you can show a prior prescription: up to a 30-day supply or the smallest package, no more than three times a calendar year (ORS 689.696). It's a safety net for when you run out, not a substitute for your plan's coverage.

How to check whether a plan covers Lantus

1. Write down the exact drug. Name, strength and how often you take it. A plan can cover one form of Lantus and not another.
2. Look it up in each plan's formulary. Enter your drugs and ZIP code on PlanMatch or Medicare.gov's Plan Finder to see which plans list Lantus and any rules.
3. Read the rules next to the drug. Prior authorization, step therapy or quantity limits mean your prescriber may need to send the plan information before it pays.
4. Check your 2027 notice. Your plan's Annual Notice of Change says whether Lantus stays on the formulary next year. Open Enrollment runs October 15 to December 7, 2026, for coverage starting January 1, 2027.
5. Get help if you want it. You can request a call from a licensed insurance agent, who can compare plans from the companies they work with, or call 1-800-MEDICARE (1-800-633-4227, TTY 1-877-486-2048) for information on all of your options.

If your plan doesn't cover Lantus, you or your prescriber can ask for a coverage determination or a formulary exception. Once the plan has your prescriber's supporting statement, it generally must decide within 72 hours, or 24 hours if your prescriber says waiting could seriously harm your health. New members can usually get a one-time transition supply of a drug they were already taking while they ask for an exception or switch. See How do I appeal a Medicare denial in Oregon?

Sources

• National Library of Medicine — DailyMed: Lantus prescribing information (FDA label)
• Medicare.gov — Drug coverage (Part D)
• Medicare.gov — Prescription drugs (outpatient) under Part B
• CMS — CY 2027 Rate Announcement (2027 Part D out-of-pocket threshold and Extra Help copays)
• FDA — Purple Book: licensed biological products, biosimilars and interchangeables
• Oregon Revised Statutes — ORS 689.696, emergency insulin from a pharmacist
• Medicare.gov — Medicare Prescription Payment Plan
• Social Security — Extra Help with Medicare prescription drug plan costs
• CMS — Part D plan files record layout (PDP Region 30: Oregon, Washington)
• Oregon Health Authority — OHP and Medicare

Frequently asked questions

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