Last reviewed August 13, 2026 by the Medically Modern coverage team. Coverage rules change — always confirm with your plan.
Medicare covers the FreeStyle Libre family under Part B as durable medical equipment (DME). The rules come from a Medicare coverage policy called LCD L33822 (Glucose Monitors), and they are broader than many people realize: if you have diabetes and take insulin — any amount, even a single basal injection a day — you likely meet the medical criteria. People who don’t use insulin can still qualify if their chart documents problematic hypoglycemia.
After the medical criteria, the rest is mostly paperwork: a provider visit within the last six months, a prescription written for the current “Plus” sensors, and a Medicare-enrolled supplier who bills Part B correctly. That last piece trips up more people than the eligibility rules do — more on that below.
Who qualifies for Medicare CGM coverage
Under LCD L33822, Medicare covers a CGM when all of the following are true:
- You have a diabetes diagnosis — any type.
- You meet one of two clinical paths: you use insulin (any regimen counts — a once-daily basal injection or a pump both qualify; Medicare dropped the multiple-daily-injection minimum in 2023), or your medical records document problematic hypoglycemia — more than one level 2 low (glucose below 54 mg/dL) that kept happening despite treatment adjustments, or one level 3 low (below 54 mg/dL with confusion or physical impairment) that required another person’s help.
- You’ve seen the provider who manages your diabetes within the 6 months before the order — an in-person or Medicare-approved telehealth visit both count.
- Your provider attests you’ve been trained on the device, which happens through the prescription itself.
Notice what’s not on the list: there is no finger-stick testing log to keep and no minimum number of daily injections. Those older requirements were eliminated. If you’re unsure which path fits you, our do I qualify guide walks through it question by question — and these are payer rules, not medical advice, so talk with your doctor about whether a CGM fits your treatment plan.
What you’ll pay in 2026
In 2026, the Medicare Part B annual deductible is $283. Once it’s met, Medicare pays 80% of the Medicare-approved amount for your reader and sensors and you pay the remaining 20% — provided your supplier accepts assignment (agrees to Medicare’s approved price). GoodRx estimates that 20% share works out to roughly $45 per box of two sensors, or about $45–$55 a month without supplemental coverage.
| If you have… | Your typical 2026 cost for Libre sensors |
|---|---|
| Original Medicare only | $283 Part B deductible (once per year, if not already met), then 20% coinsurance — roughly $45–$55/month |
| Original Medicare + Medigap Plan G | You pay the Part B deductible; Plan G pays the 20% coinsurance, so ongoing cost is typically $0 |
| Original Medicare + Medigap Plan F | Typically $0 — Plan F covers the deductible and the 20% (only available if you were Medicare-eligible before 2020) |
| Medicare Advantage | Varies by plan — must cover CGMs at least as well as Original Medicare; Abbott reports most Medicare Advantage patients pay $0, but prior authorization, copays, and network suppliers usually apply |
Assignment matters: these numbers assume your supplier is Medicare-enrolled and accepts assignment. Medicare.gov warns that non-participating suppliers may charge more — so ask before you order. For a fuller cost breakdown across every payer type, see our FreeStyle Libre cost guide.
Which FreeStyle Libre models Medicare covers
The models Medicare covers in 2026 are the FreeStyle Libre 2 Plus and FreeStyle Libre 3 Plus — both 15-day-wear sensors indicated for ages 2 and up. Abbott discontinued the original Libre 2 and Libre 3 sensors on September 30, 2025. If you were using one of those, your coverage doesn’t change — Abbott confirms the Plus sensors carry the same Medicare coverage as their predecessors — but you do need a new prescription written for a Plus sensor, since pharmacies and suppliers can no longer fill the old ones.
One Medicare-specific detail: the prescription must include both the reader and the sensors, and the reader must be used on some days each month, even if you mostly check readings on your phone. Comparing the two models? See Libre 2 Plus vs. Libre 3 Plus, or our dedicated Libre 3 Plus Medicare guide.
Find out if Medicare covers you — in about 2 minutes
Medically Modern verifies your Part B, Medigap, or Medicare Advantage benefits and handles the paperwork with your doctor. Free, no obligation.
Pharmacy or DME supplier? It changes what you pay
Here’s the detail that catches the most people off guard: Medicare pays for CGMs through the Part B DME benefit, not your Part D drug plan. A pharmacy can only bill Medicare for Libre sensors if it is an enrolled DME supplier — and many retail pharmacies, including major chains like CVS and Walgreens, are not. When that happens, the claim never reaches Medicare, and people end up paying the full cash price at the register with no reimbursement.
An enrolled DME supplier that accepts assignment does two things a non-enrolled pharmacy can’t. First, it caps your cost at the deductible plus 20% coinsurance. Second, it manages the documentation Medicare actually audits — the standard written order, the chart notes proving insulin use or hypoglycemia, and your visit dates. That second part matters more than ever: Medicare’s DME contractors announced targeted prepayment reviews of CGM claims in late 2025, so claims with thin documentation are getting stopped before they’re paid.
Keeping your coverage: the 6-month visit rule
Getting approved isn’t the finish line. To keep Medicare paying for sensors, you need a visit with your treating provider every six months — in person or by Medicare-approved telehealth — documenting that you’re using the CGM and following your diabetes treatment plan. Missing that window is the single most common reason Medicare stops paying for sensors that were previously covered.
A good supplier tracks this for you. Medically Modern logs your visit dates and flags upcoming deadlines before a refill is due, so a lapsed appointment doesn’t turn into a lapsed shipment.
Common Medicare denial reasons — and how they get fixed
| Denial | Why it happens | The fix |
|---|---|---|
| Missed 6-month follow-up visit | The top continued-coverage denial — no documented visit in the last six months | Schedule the visit (telehealth counts); a supplier that tracks visit dates helps prevent this |
| “Not medically necessary” (CO-50) | The chart doesn’t clearly document insulin use or qualifying hypoglycemia | A redetermination request with the clinical notes attached — and when a claim like this denies, the balance falls on the supplier, not you |
| “Same or similar” overlap | Medicare shows a recent CGM claim from a prior supplier or pharmacy fill | The supplier checks your claim history before shipping and times the next order to the correct billable date |
| No CGM equipment on file | Sensors were billed without a reader or receiver on record with Medicare | Resolved with an ownership narrative on the claim or by billing the reader properly |
The pattern is clear: nearly every common denial is preventable with front-end work — verifying claim history, collecting chart notes before the first shipment, and tracking visit dates. That’s the core of what a specialized CGM supplier does.
How to get FreeStyle Libre through Medicare
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Confirm your provider visit
If it’s been more than six months since you saw the provider who manages your diabetes, book a visit — in person or telehealth. The order must be written within six months of a visit.
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Ask your doctor about a prescription
It should be written for a FreeStyle Libre 2 Plus or 3 Plus and include both the reader and the sensors — Medicare requires both on the order.
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Choose a Medicare-enrolled supplier that accepts assignment
This is what caps your cost at the deductible plus 20% and reduces the risk of audit problems.
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Start with a free coverage check
Medically Modern verifies your Medicare and supplemental benefits, requests the prescription and chart notes from your doctor, checks your claim history for overlaps, and ships sensors to your door. See the full walkthrough in how to get FreeStyle Libre.
Frequently asked questions
Does Medicare cover the FreeStyle Libre 3 Plus?
Yes. The Libre 3 Plus sensor and its reader are both eligible for Medicare reimbursement when you meet the coverage criteria. We cover the details in our Libre 3 Plus Medicare guide.
How often will Medicare pay for new sensors?
Part B pays a monthly supply allowance (billing code A4239) that covers everything you need for 30 days of wear, and suppliers can bill up to three months at a time — the next shipment is billable on day 31, or day 91 for 90-day supplies. The allowance is all-inclusive: if a sensor fails mid-period, the supplier must replace it at no additional charge.
Do I need to prove finger-stick testing to qualify?
No. Medicare removed the old fingerstick-frequency and multiple-daily-injection requirements. Since 2023, a diabetes diagnosis plus any insulin use — or documented problematic hypoglycemia — meets the medical criteria. One related note: because this type of CGM replaces a home glucose meter, Medicare won’t separately pay for test strips and lancets alongside it.
Is a reader required, or can I just use my phone?
For Medicare coverage, the prescription must include both the reader and the sensors, and Abbott notes the reader must be used on some days each month. Many people still view readings on the phone app day to day — ask your provider how to fit the reader into your routine.
Does Medicare Advantage cover FreeStyle Libre?
Yes — Medicare Advantage plans must cover CGMs at least as well as Original Medicare, so the same eligibility rules apply. Plans typically layer on prior authorization, copays, and network-supplier requirements. Abbott reports most Medicare Advantage patients pay $0 for Libre systems, but confirm your own plan — a free benefits check sorts this out quickly.
I have type 2 diabetes but don’t use insulin. Can I qualify?
Possibly — through the hypoglycemia path: records showing more than one low below 54 mg/dL despite treatment adjustments, or one severe low that required someone else’s help. Without insulin use or documented hypoglycemia, Original Medicare doesn’t currently cover a CGM, and as of early 2026 a broader coverage decision for type 2 non-insulin users was still pending. Some commercial plans have already begun covering this group.
Sources: CMS LCD L33822 (Glucose Monitors), Medicare.gov, Federal Register (2026 Part B deductible), Noridian DME MAC, Abbott transition notice, GoodRx.