Last reviewed August 13, 2026 by the Medically Modern coverage team. Coverage rules change — always confirm with your plan.
You can’t buy a FreeStyle Libre 2 Plus or 3 Plus sensor off the shelf. Both are prescription products, and every payer — Medicare, Medicaid, and private insurance — requires a valid prescription before it will pay a claim. The good news: getting one is a well-worn path, and most of the paperwork can be done for you.
How long it takes depends mostly on that paperwork — how quickly your provider sends the order and chart notes, and whether your plan requires prior authorization. Here is each step, what happens behind the scenes, and what you can do to keep things moving.
The 4 steps to get FreeStyle Libre
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Talk to your provider and get the prescription
Any practitioner who treats your diabetes can write the order — a primary care doctor, an endocrinologist, or a nurse practitioner. Tell them you’d like to discuss a continuous glucose monitor, and mention anything relevant to coverage: insulin use (for Medicare, any insulin counts — there’s no injection-count minimum) or episodes of low blood sugar. Our qualification guide walks through the exact criteria by insurance type.
Two details matter here. First, Medicare requires an in-person or Medicare-approved telehealth visit with your treating practitioner within the 6 months before the order — a virtual visit counts. Second, make sure the prescription is written for a current model, the Libre 2 Plus or Libre 3 Plus; the original Libre 2 and 3 sensors were discontinued September 30, 2025. For Medicare, the prescription must include both the reader and the sensors.
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Choose where to fill it: pharmacy or home-delivery supplier
This is the step most people don’t know they have. Libre prescriptions can be filled at a retail pharmacy or through a durable medical equipment (DME) supplier that ships to your home — and the right choice depends on your insurance. To be candid: if you have commercial insurance that covers Libre under its pharmacy benefit with a small copay, the pharmacy counter is often the fastest route. The DME route earns its keep with Medicare, which pays for CGMs under Part B as medical equipment — not under a drug plan — so a pharmacy can only bill Medicare if it’s an enrolled DME supplier. Major chains like CVS and Walgreens often are not, which can leave you paying cash with no reimbursement.
Retail pharmacy DME home-delivery supplier Works best for Commercial plans covering CGMs under the pharmacy benefit (most do) Medicare, Medicare Advantage, Medicare/Medicaid duals, and plans using the medical/DME benefit Upfront cost Your copay at pickup — Abbott reports most covered commercial patients pay $0–$20 per sensor. Medicare patients at a non-enrolled pharmacy can be stuck paying the full cash price Billed to insurance after verification. With Medicare assignment, your share is capped at the Part B deductible plus 20% coinsurance Medicare billing Only if the pharmacy is an enrolled Medicare DME supplier — many are not Bills Medicare Part B directly as its core business Refills You request each refill and pick it up 90-day supplies shipped to your door; the supplier tracks reorder dates Paperwork help Limited — prior-auth problems usually bounce back to you and your doctor Supplier collects chart notes, submits prior auth, and tracks Medicare’s 6-month visit rule Medicaid varies by state — many states run CGMs through the pharmacy benefit (New York, for example, requires Medicaid-enrolled pharmacies for its preferred CGMs), while others use the DME channel. See our Medicaid coverage guide for how your state handles it.
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Benefits verification and prior authorization
If you go the supplier route, this step is mostly done for you. Before anything ships, a good DME supplier verifies your benefits with your insurer, checks your Medicare claim history for conflicts, and collects the documentation payers audit: the standard written order and the chart notes showing you meet your plan’s criteria. If your plan requires prior authorization — common with Medicare Advantage and many commercial plans — the supplier submits it with your doctor’s records. Commercial approvals typically last 12 months once granted.
This is the unglamorous step that prevents most denials. Medicare’s contractors actively audit CGM claims, and the most common problems — a lapsed visit under the 6-month rule from step 1, chart notes that never mention insulin or hypoglycemia — are exactly what verification catches before they become your problem.
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Delivery and refills
Once approved, sensors ship to your door — typically as a 90-day supply. Under Medicare, sensor supplies are billed as a monthly allowance (up to 3 months per claim), and the next claim can’t be billed until day 31, or day 91 for 90-day cycles, so your supplier times reorders around those dates. One ongoing requirement to know: Medicare’s continued coverage depends on a visit with your provider (in person or by approved telehealth) every 6 months. A supplier that tracks that date for you — and nudges you before it lapses — is quietly protecting your coverage.
Want steps 2 through 4 handled for you?
Medically Modern verifies your benefits, works with your doctor on the paperwork, and ships to all 50 states — free check, no obligation.
What to have ready
You can start a coverage check with surprisingly little, but having these on hand speeds everything up:
- Your insurance card (member ID and plan name)
- Your prescribing provider’s name and office contact information
- The date of your last diabetes visit — Medicare’s 6-month visit rule from step 1 applies here
- Your medication list, especially any insulin, and any history of serious low-blood-sugar episodes
- Whether you’ll use the smartphone app, a reader, or both — Medicare prescriptions must include a reader along with the sensors
Getting FreeStyle Libre without insurance
No coverage, or waiting for it to start? You can still fill a Libre prescription with cash: average retail runs roughly $240–$250 a month for two sensors, discount-card programs bring that to about $162–$175, and Abbott’s copay savings program caps eligible commercially insured and uninsured patients at no more than $75 per two sensors (it excludes Medicare, Medicaid, and other government programs, Massachusetts residents, and Kaiser members). Abbott’s MyFreeStyle program also offers a one-time sample sensor for eligible new users with a prescription (like the copay program, it excludes government-insurance beneficiaries and Massachusetts residents). Our cost guide breaks down every option, including what people typically pay with each type of insurance.
Switching from a pharmacy or another supplier
Already getting sensors somewhere else? Switching is routine, but one Medicare rule is worth knowing: “same or similar” overlap. Medicare pays for one CGM supply allowance per period, so if a previous supplier — or a pharmacy fill — has already billed for dates you’re still inside, a new claim for that period will deny. A careful supplier checks your Medicare claim history before shipping anything, so tell your new supplier when and where your last fill happened and let them time the first shipment. If your old prescription was written for the discontinued Libre 2 or Libre 3, you’ll also need a fresh one for a Plus model.
Frequently asked questions
Do I need a prescription for FreeStyle Libre?
Yes. The Libre 2 Plus and 3 Plus are prescription-only, and every insurance type requires a valid prescription before it will pay. Abbott’s over-the-counter Lingo biosensor needs no prescription, but it’s a wellness product for adults not on insulin and isn’t intended for diabetes treatment decisions. Libre Rio — Abbott’s OTC CGM for type 2 adults not on insulin — was FDA-cleared in June 2024 but hadn’t launched as of mid-2026.
Can I get FreeStyle Libre the same day?
Sometimes. If your commercial plan covers Libre under its pharmacy benefit and no prior authorization is required, a retail pharmacy can fill the prescription like any other. The Medicare route usually takes longer, because the supplier must verify your eligibility, claim history, and chart notes before it can bill Part B — skipping that step is how people end up with denied claims and surprise bills.
Can a telehealth doctor prescribe FreeStyle Libre?
Yes. Medicare’s coverage policy explicitly accepts an in-person or Medicare-approved telehealth visit with your treating practitioner — both for the visit required within 6 months before the order and for the follow-up required every 6 months afterward. Commercial and Medicaid plans set their own rules, so confirm with your plan if all of your diabetes care is virtual.
How do FreeStyle Libre refills work?
Under Medicare, sensors bill as a monthly supply allowance, and a supplier can bill up to 3 months at a time — the next claim can’t go in until day 31, or day 91 on a 90-day cycle. Continued Medicare coverage also requires a provider visit every 6 months. Commercial plans typically set quantity limits (one large-plan policy allows 6 sensors per 84 days) and prior-auth approvals often last 12 months. A good supplier tracks all of these dates so refills arrive before you run out.
My prescription is for the old Libre 2 or Libre 3 — is it still good?
No — you’ll need a new one. Abbott discontinued the original Libre 2 and Libre 3 sensors after September 30, 2025. The current models are the Libre 2 Plus and 3 Plus (15-day wear, ages 2 and up), and pharmacies and suppliers need a prescription written specifically for a Plus sensor. Abbott states the Plus sensors carry the same Medicare coverage as the models they replaced — see our model comparison if you’re deciding between them.
Sources: CMS LCD L33822 (Glucose Monitors), Medicare.gov, Noridian DME MAC, Abbott transition notice, Abbott private insurance, GoodRx.