A continuous glucose monitor is a small sensor worn on the arm or abdomen that reads glucose every few minutes and sends the number to a phone or a handheld receiver. There is no single price for one, because the category split in two between 2024 and 2026 and the two halves are priced nothing alike.
On one side are prescription systems built for insulin users, sold through pharmacies and durable medical equipment suppliers at pharmacy prices. On the other side are over-the-counter sensors sold direct to consumers by subscription at consumer-electronics prices. Every figure below was verified on September 3, 2026, and the sensor prices move faster than almost anything else on this site.
What Does a Continuous Glucose Monitor Cost Without Insurance?
The table normalizes everything to 30 days of wear, because sensor lifespan varies from 10 days to a full year and comparing box prices is meaningless without it.
| CGM system (30 days of sensors) | Low | Typical | High |
|---|---|---|---|
| Dexcom Stelo, over the counter | $84 (3-month plan) | $89 (monthly subscription) | $99 (one-time 2-pack) |
| Abbott Lingo, over the counter | $89 (12-week plan) | $95 (4-week plan) | $116 (single 14-day sensor) |
| FreeStyle Libre 3 Plus, prescription | $162.28 (discount card) | not published | $246.46 (average retail) |
| FreeStyle Libre 2 Plus, prescription | $165.28 (discount card) | not published | $192.86 (highest card price listed) |
| Dexcom G7 10-day, prescription | $357.14 (discount card) | not published | $566.14 (average retail) |
| Dexcom G7 15 Day, prescription | about $397 (discount card) | not published | about $488 (highest retail row listed) |
| Medtronic Guardian 4, prescription | about $541 (discount card) | not published | about $701 (retail) |
| Eversense 365, implanted | no published cash price | no published cash price | no published cash price |
The over-the-counter figures come straight from the sellers. Stelo by Dexcom publishes $99 for a one-time two-biosensor pack, $89 a month on subscription, and $252 for a 3-month subscription of six biosensors, each biosensor lasting up to 15 days. Abbott’s Lingo publishes $54 for one 14-day biosensor, $89 for two, and $249 for six shipped every 12 weeks, which is $41.50 a sensor.
The prescription figures come from SingleCare’s product pages, all updated September 3, 2026. Its Dexcom G7 Sensor page states an average pharmacy price of $566.14 per box of three sensors, with a card price as low as $357.14. Its FreeStyle Libre 3 Plus Sensor page states $246.46 for two sensors and a card price of $162.28.
The Medtronic row is arithmetic, not a quoted monthly price. SingleCare lists Guardian 4 sensors at $2,453 for three boxes of five sensors, which is 105 days of wear, with a card price around $1,895. Divided down to 30 days that is roughly $701 retail and $541 with a card, which makes Medtronic’s pump sensors the most expensive mainstream option to buy in cash.
Eversense from Senseonics is the outlier. Its sensor is implanted under the skin and lasts up to a year, which changes the whole cost shape, but the company publishes no cash price and routes uninsured buyers to a phone line for a quote instead. Treat any Eversense number you see online as unverified until you get it in writing.
The 2024 to 2026 over-the-counter shift is why the floor dropped
Before 2024 every CGM in the United States needed a prescription, which meant every CGM was priced like a pharmacy product. FDA cleared Dexcom’s Stelo on March 5, 2024 as the first over-the-counter continuous glucose monitor, for adults 18 and older who do not use insulin. FDA cleared Abbott’s Libre Rio under 510(k) K233861 on June 7, 2024, alongside the wellness-focused Lingo.
That opened a second market with a completely different price logic. An over-the-counter sensor is sold like a subscription box: one price, no prescription, no benefits investigation, no pharmacy counter. The result is that the cheapest legitimate way to wear a CGM went from roughly $200 a month to under $90, which is the single most useful thing an uninsured reader can know about this category.
What Drives the Price
Sensor lifespan. This is the biggest lever and the one buyers most often ignore. A Stelo sensor on the 3-month plan is $42 for 15 days, about $2.80 a day. A Dexcom G7 sensor at average retail is roughly $189 for 10 days, about $18.87 a day. Same body part, same idea, a sixfold difference in daily cost.
Prescription versus over the counter. Prescription sensors carry low-glucose alarms, pump integration and a regulatory path built around insulin dosing. Over-the-counter sensors do not, and FDA said plainly that Stelo is not for people with problematic hypoglycemia. You are not paying more for nothing, but if you are not an insulin user you may be paying for capability you will never use.
Which channel fills it. Prescription CGMs can be billed either through a pharmacy or through a durable medical equipment supplier, and the two channels quote wildly different numbers to a cash buyer. The pharmacy channel is where discount cards work. The DME channel is built around insurance billing and is usually the worse place to be uninsured.
Reader versus phone app. Every current system will run on a compatible smartphone at no extra hardware cost. The optional handheld receiver is a separate purchase that can add hundreds of dollars up front. If your phone is compatible, skip it.
Discount cards. Across every prescription product in the table, a card cut the price by 30% to 40%. Note that these card prices are session and pharmacy dependent, so the number you get quoted at your own counter will not match a website exactly. Use them as a target to negotiate toward, not a guarantee.
Cash Price vs. Insurance
Read manufacturer price claims carefully. Every major CGM maker advertises a low monthly figure, and in almost every case that figure is a copay for someone with commercial insurance, not a cash price. If you are uninsured, those numbers do not apply to you and the retail rows above are your starting point.
Medicare works differently again. Medicare Part B covers therapeutic CGMs as durable medical equipment for people with diabetes who take insulin or have a history of problematic hypoglycemia, provided a physician orders the device and the patient is trained on it. Medicare.gov’s coverage page states that after you meet the Part B deductible, you pay 20% of the Medicare-approved amount if your supplier accepts assignment. That coinsurance is permanent and monthly, which is why Medicare beneficiaries often still end up shopping cash prices.
If you have commercial insurance with a high deductible, run the math both ways. An over-the-counter sensor bought outright with HSA or FSA dollars can beat a deductible-phase pharmacy claim outright, and it does not require a prior authorization. If a pharmacy or supplier quotes you something that looks nothing like the table above, our fair price checker is a fast sanity test.
How to Pay Less
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Start with the over-the-counter sensors if you do not use insulin. Stelo at $89 a month and Lingo at $89 for four weeks are the cheapest verified prices in the category, they need no prescription, and both are HSA and FSA eligible. Our Dexcom cost guide breaks down Stelo against the prescription G7 line, and our FreeStyle Libre cost guide does the same for Abbott.
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Buy the longest plan you can afford. Every seller prices per sensor downward as the commitment lengthens. Stelo goes from $49.50 a sensor one-time to $42 on the 3-month plan. Lingo goes from $54 to $41.50. On a device you will wear indefinitely, that is real money.
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Run a discount card on every prescription fill. The gap between $566.14 and $357.14 on a single box of Dexcom G7 sensors is about $209 a month for the identical product. Our comparison of GoodRx vs. SingleCare covers checking both against the same NDC before you hand over the prescription.
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Skip the receiver and use your phone. The handheld receiver is optional on both major prescription systems and is one of the largest single line items in a first-month bill.
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Ask for the free starter sensor before you commit. Both major manufacturers run first-sensor programs with no purchase required, which is the cheapest possible way to find out whether you will actually wear the thing.
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Price the rest of the diabetes bill at the same time. The sensor is one line. Our guides to insulin costs without insurance, metformin, diabetic test strips and A1C testing cover the rest of it. If the visits are the problem rather than the supplies, a free or sliding-scale clinic can handle the endocrinology follow-ups, and if a hospital or supplier bill has already landed, our medical bill negotiation guide covers what to say before you pay it.
Bottom Line
Budget $84 to $116 a month if you are buying an over-the-counter sensor and $162 to $566 a month if you are filling a prescription one at a pharmacy, as of September 2026. Medtronic’s pump sensors sit above that at roughly $541 to $701 a month in cash.
The single decision that moves your cost the most is not the brand. It is whether you need a prescription-grade sensor at all. If you use insulin or have a history of dangerous lows, you do, and the discount card is your main lever. If you do not, the over-the-counter market that opened in 2024 has already cut the entry price by more than half, and it does not involve insurance at any point.