Dexcom G7 15-Day Sensor: The Complete Guide to the Switch From 10-Day
Dexcom has officially moved on from the 10-day G7 sensor. The Dexcom G7 15 Day received FDA clearance on April 10, 2025, and launched in the United States on December 1, 2025, delivering up to 15.5 days of continuous glucose monitoring per sensor. That’s a 50% increase in wear time over the original G7 — and it means fewer sensor changes, fewer supply shipments, and a simpler daily routine for millions of people managing diabetes.
Whether you’re currently using the 10-day G7, still on the G6, or you’ve already switched to the 15-day version and have leftover supplies, this guide covers everything: what changed, what didn’t, how the transition works, what it costs, and how to sell your unused Dexcom G7 sensors for cash through StripsUSA.
What Is the Dexcom G7 15-Day Sensor?
The Dexcom G7 15 Day is the latest continuous glucose monitoring (CGM) system from Dexcom. It uses the same compact, all-in-one design as the original G7 — no separate transmitter required — but with a new algorithm that extends the sensor’s functional life from 10 days to 15 days. Including the built-in 12-hour grace period, each sensor can deliver up to 15.5 days of real-time glucose data.
The G7 15 Day is FDA-cleared as an integrated continuous glucose monitoring (iCGM) system, meaning it can be used to make diabetes treatment decisions without confirmatory fingerstick blood glucose tests. It’s indicated for adults 18 years and older with type 1 diabetes, type 2 diabetes, or gestational diabetes.
Dexcom G7 15-Day vs. 10-Day: Side-by-Side Comparison
The G7 15 Day looks and feels nearly identical to the 10-day version — it’s the same size, uses the same applicator, and connects to the same app. But there are important differences under the hood that affect how the sensor performs and who can use it. Here’s a detailed breakdown:
Wear Time
The most obvious upgrade. The original G7 sensor lasted up to 10 days plus a 12-hour grace period (10.5 days total). The G7 15 Day lasts up to 15 days plus a 12-hour grace period (15.5 days total). That’s roughly 50% longer per sensor. In practical terms, you go from needing 3 sensors per month down to just 2.
Accuracy
The G7 15 Day actually improved on the already-strong accuracy of the original G7. The overall mean absolute relative difference (MARD) — the gold-standard measurement for CGM accuracy — dropped from 8.2% on the 10-day G7 to 8.0% on the 15-day version. A lower MARD means the sensor’s readings are closer to actual blood glucose values. This makes the G7 15 Day both the longest-lasting and most accurate wearable CGM system available.
Warm-Up Time
This is one trade-off. The original G7 had a 30-minute warm-up period after insertion before it began delivering glucose readings. The G7 15 Day requires a 60-minute warm-up. Dexcom says the longer warm-up is needed to power the new algorithm that enables the extra 5 days of wear. While 60 minutes is longer than the G7’s 30 minutes, it’s still significantly shorter than the G6’s 2-hour warm-up — and you’re doing it 33% less often (2 times a month instead of 3).
Age Eligibility
This is an important distinction. The original G7 is cleared for ages 2 and up. The G7 15 Day is currently cleared for adults 18 and older only. If you’re a parent managing a child’s diabetes with a Dexcom CGM, the standard 10-day G7 remains the option for now. Dexcom may seek pediatric clearance in the future, but as of early 2026 the 15-day version is adult-only.
Sensor Reliability
In clinical studies, approximately 73.9% of G7 15 Day sensors lasted the full 15 days when used according to the product labeling. That means roughly 26% of sensors may not make it to the full 15-day mark. If your sensor fails early, you can contact Dexcom for a replacement. For comparison, the original G7 had a similar early-termination rate relative to its 10-day wear period.
Physical Design and Size
The G7 15 Day uses the same compact all-in-one sensor design as the 10-day G7. There’s no separate transmitter to manage — the sensor and transmitter are integrated into a single disposable unit. The applicator is the same, the insertion process is the same, and the sensor footprint on your body is the same. If you’re already comfortable applying a G7, the 15-day version will feel identical.
App Compatibility and Features
Both versions use the same Dexcom G7 app. All alerts, alarms, event logging, data sharing, and connectivity features are identical. The G7 15 Day also maintains the same device compatibility, including direct Apple Watch connectivity and integration with insulin pump systems like the Tandem t:slim X2 and Tandem Mobi (G7 15 Day compatibility with these pumps was expected in early 2026).
Waterproof Rating
The G7 15 Day maintains the same waterproof design as the original G7. It’s the only waterproof CGM system available, so you can swim, shower, and exercise without worrying about water damage throughout the full 15-day wear period.
Quick Comparison Table
| Feature | Dexcom G7 (10-Day) | Dexcom G7 15 Day |
|---|---|---|
| Wear Time | Up to 10.5 days | Up to 15.5 days |
| Accuracy (MARD) | 8.2% | 8.0% |
| Warm-Up Time | 30 minutes | 60 minutes |
| Sensors Per Month | 3 | 2 |
| Age Eligibility | Ages 2+ | Adults 18+ |
| Separate Transmitter | No (all-in-one) | No (all-in-one) |
| App | Dexcom G7 App | Same Dexcom G7 App |
| Waterproof | Yes | Yes |
| Apple Watch | Yes | Yes |
| Insulin Pump Integration | Yes | Yes |
| Grace Period | 12 hours | 12 hours |
| FDA Clearance | 2023 | April 2025 |
The Timeline: How Dexcom Is Phasing Out Older Sensors
Dexcom isn’t just releasing the G7 15 Day as an option — they’re actively transitioning away from older products. Here’s the timeline every Dexcom user should know:
April 10, 2025: FDA Clearance
The Dexcom G7 15 Day received FDA clearance as the longest-lasting wearable and most accurate CGM system. It was cleared for adults 18 and older with diabetes.
December 1, 2025: U.S. Launch
The G7 15 Day became available in the United States, initially through durable medical equipment (DME) providers, with full retail availability rolling out in the following weeks. Both DME and pharmacy channels now carry the G7 15 Day.
July 1, 2026: G6 Manufacturing Ends
Dexcom has announced that they will stop manufacturing the Dexcom G6 CGM System after July 1, 2026. If you’re still on the G6, Dexcom recommends upgrading to either the G7 or G7 15 Day before this date to ensure uninterrupted CGM supplies and support. If you have G6 coverage through insurance, you will likely have coverage for the G7 or G7 15 Day as well.
What About the 10-Day G7?
As of early 2026, Dexcom has not announced a discontinuation date for the original 10-day G7. It remains available and cleared for ages 2 and up. However, the direction is clear: the 15-day version is the future of Dexcom’s consumer CGM line. It’s expected that the 10-day G7 will eventually be phased out as the 15-day version gains pediatric clearance and broader adoption.
How Much Does the Dexcom G7 15-Day Sensor Cost?
Pricing is one of the most common concerns during any product transition. Here’s what to expect with the G7 15 Day:
With Insurance
If you currently have insurance coverage for Dexcom CGM, your monthly cost should remain the same when switching from the G7 to the G7 15 Day. Since you’ll need fewer sensors per month (2 instead of 3), the per-sensor cost may be slightly higher, but the total monthly cost to you stays the same. Most people with CGM coverage pay $20 or less per month.
Coverage is strong across payer types. Approximately 87% of people using insulin with commercial insurance are covered. For Medicare beneficiaries using insulin, coverage is at 100%. The G7 15 Day has met the category requirements for therapeutic CGM systems set by the Centers for Medicare & Medicaid Services (CMS).
Without Insurance
Without insurance, the cash price for a package of five G7 15-Day sensors runs roughly $960–$1,085 depending on the pharmacy and any discount programs you use. However, the math still works out similarly on a per-day basis since each sensor lasts 50% longer. Dexcom offers a Pharmacy Savings Program that can save up to $200 per 30-day supply, and discount cards from services like GoodRx can reduce costs further.
For a deeper look at Dexcom G7 pricing, check out our Dexcom G7 price guide.
How to Switch From the 10-Day G7 to the 15-Day G7
Switching is straightforward, but the exact steps depend on how you get your Dexcom supplies:
If You Get Supplies Through a DME Provider
Contact your DME supplier and ask to switch to the G7 15 Day. In most cases, they can update your supply order without requiring a new prescription. Your provider may need to update the product code (the G7 15 Day uses different sensor codes than the 10-day version), but this is typically a simple administrative change.
If You Get Supplies Through a Pharmacy
Your doctor will need to write a new prescription specifying the Dexcom G7 15 Day. Bring this to your pharmacy (CVS, Walgreens, etc.) and they can fill it like any other prescription. If you have existing G7 refills, your pharmacist may be able to switch the product without a completely new prescription — call ahead to check.
If You’re on Medicare
Medicare covers the G7 15 Day for beneficiaries who use insulin or have a documented history of severe hypoglycemia. If you’re already covered for the G7 or G6, you should have coverage for the G7 15 Day. Your DME provider can help facilitate the switch. If you use a Dexcom receiver, it can be updated to be compatible with the G7 15 Day through a software update.
If You’re Still on the Dexcom G6
With G6 manufacturing ending July 1, 2026, now is the time to transition. You can upgrade directly to the G7 15 Day (if you’re 18+) or the standard G7. Dexcom’s transition page walks through the process for your specific insurance situation. The key things to know: you won’t need a separate transmitter anymore, the sensor is smaller, and the warm-up time is shorter than the G6’s 2-hour warm-up (even the G7 15 Day’s 60-minute warm-up is a significant improvement). For more on selling your leftover G6 supplies during the transition, see our sell Dexcom G6 sensors page.
What Happens to Your Leftover 10-Day Sensors?
If you’re switching to the G7 15 Day, you may find yourself with leftover 10-day G7 sensors. This happens frequently during any product transition — insurance auto-ships supplies on a schedule, and the switch doesn’t always align perfectly with your existing inventory. You may also have extra sensors from:
- Insurance overshipments — Your DME or pharmacy sent your regular 10-day supply before the switch went through
- Stockpiling — You had been building up a buffer supply of sensors
- Prescription changes — Your doctor changed your CGM routine or you’re switching to a different management approach
- Caregiver situations — A family member no longer uses their Dexcom supplies
Those leftover sensors still have significant value. Unused, sealed, and unexpired Dexcom G7 sensors are in high demand because many people are still using the 10-day version — especially pediatric patients (ages 2–17) who can’t use the 15-day version yet.
Sell Your Unused Dexcom G7 Sensors to StripsUSA
Don’t let your extra Dexcom sensors expire in a drawer. StripsUSA buys unused Dexcom G7 sensors — both the 10-day and 15-day versions — from sellers across all 50 states. We offer competitive prices, free shipping, and same-day payment.
What Dexcom Supplies Do We Buy?
- Dexcom G7 15-Day sensors (Code 013, 1 sensor per box)
- Dexcom G7 10-Day sensors (Code 011 and 012)
- Dexcom G6 sensors (3-pack and single)
- Dexcom G6 transmitters
- Dexcom G6 receivers
All Dexcom products must be unused, sealed in original packaging, and not expired. Sensors with at least 6 months before expiration get the best prices. Check our live pricing page for current rates on every product we accept.
How to Sell Your Dexcom Sensors
- Build your shipment — Browse our prices, find your Dexcom sensor model, select the quantity and expiration date, and add items to your shipment
- Choose your shipping method — At checkout, pick a free prepaid shipping kit (mailed to your door in 1–2 days) or a printable shipping label (emailed to you instantly)
- Ship and get paid — Pack your sensors securely, drop off the package at any carrier location, and receive same-day payment once we receive and verify your shipment
The entire process takes just a few minutes to start. For a detailed walkthrough, visit our How It Works page.
Frequently Asked Questions About the G7 15-Day Switch
Can I use the G7 15-Day sensor with my current G7 app?
Yes. The G7 15 Day uses the same Dexcom G7 app. You may need to update to the latest version to support the 15-day sensor, but you won’t need to download a different app. All your existing settings, alerts, and sharing configurations carry over.
Will my insulin pump work with the G7 15-Day?
The G7 15 Day is compatible with the same insulin pump systems as the original G7. Tandem t:slim X2 and Tandem Mobi integration with the G7 15 Day was expected in early 2026. Check with your pump manufacturer for the latest compatibility updates.
Is the G7 15-Day more accurate than the 10-day version?
Slightly, yes. The G7 15 Day has an overall MARD of 8.0% compared to 8.2% for the 10-day G7. While the difference is small, it means the 15-day version is technically the most accurate wearable CGM on the market. Importantly, the accuracy holds up throughout the full 15-day wear period — it doesn’t degrade as the sensor ages.
Why is the warm-up time longer?
The G7 15 Day uses a new algorithm to achieve the extended 5 additional days of wear. This algorithm requires a 60-minute warm-up period to calibrate properly, compared to 30 minutes for the original G7. Dexcom says this trade-off was necessary to ensure the sensor maintains accuracy throughout the longer wear period. The good news: you’re doing this warm-up less often (2x per month instead of 3x).
Can children use the G7 15-Day sensor?
Not currently. The G7 15 Day is FDA-cleared for adults 18 and older only. Children ages 2–17 should continue using the standard Dexcom G7 (10-day). Dexcom may pursue pediatric clearance for the 15-day version in the future, but no timeline has been announced.
What if my G7 15-Day sensor fails before 15 days?
In clinical studies, about 74% of sensors lasted the full 15 days. If your sensor fails early, contact Dexcom customer support for a free replacement sensor. Early sensor termination can happen with any CGM system and doesn’t necessarily indicate a product defect — factors like application site, physical activity, and body chemistry can all play a role.
Do I need a new prescription to switch?
It depends. If you get your supplies through a DME provider, they can often update the product code without a new prescription. If you fill at a pharmacy, your doctor may need to write a new prescription specifying the G7 15 Day. Contact your supplier to find out what’s needed in your specific situation.
Will my insurance cover the G7 15-Day?
In most cases, yes. If you currently have coverage for the G7 or G6, you will likely have coverage for the G7 15 Day. The monthly out-of-pocket cost should remain the same. Dexcom reports that approximately 87% of insulin-using patients with commercial insurance are covered, and 100% of Medicare beneficiaries using insulin have coverage.
Is it legal to sell unused Dexcom sensors?
Yes. If you purchased or received Dexcom sensors legally and they are your personal property, you are free to resell them. Many people sell unused sensors after switching to the 15-day version, changing their diabetes management approach, or ending up with more supplies than they need. Selling helps other people with diabetes access affordable CGM technology.
What condition do the sensors need to be in to sell them?
Sensors must be unused, sealed in their original factory packaging, and not expired. Boxes should be in good condition without water damage, tears, or missing labels. Sensors with longer expiration dates are worth more. Check our current prices to see what your specific sensors are worth.
Why the G7 15-Day Switch Creates Extra Supplies
Product transitions in the CGM world almost always result in people having extra supplies. Here’s why:
Insurance timing mismatches. Most insurance plans and DME providers ship supplies on a fixed schedule — typically a 90-day supply every 3 months. When you switch from 10-day to 15-day sensors, you need fewer sensors per month (2 instead of 3). But your old 10-day supply may have just shipped before the switch, leaving you with a full box of sensors you no longer need.
Stockpile drawdown. Many Dexcom users keep a buffer stock of sensors for emergencies or travel. When you switch to the 15-day version, that entire buffer of 10-day sensors becomes surplus.
The G6 phase-out. With Dexcom ending G6 manufacturing on July 1, 2026, anyone still on the G6 who transitions directly to the G7 15 Day will have leftover G6 sensors, transmitters, and potentially receivers. These products are still usable and valuable — especially the transmitters. You can sell your unused G6 supplies through StripsUSA.
Pediatric to adult transitions. When a child turns 18 and becomes eligible for the G7 15 Day, the family may have leftover 10-day G7 sensors that were sized or prescribed for pediatric use.
Tips for a Smooth Transition
Based on feedback from thousands of Dexcom users who have already made the switch, here are some practical tips:
- Update your app first. Make sure you’re running the latest version of the Dexcom G7 app before inserting your first 15-day sensor. Older app versions may not support the extended wear functionality.
- Plan for the longer warm-up. The 60-minute warm-up means there’s a longer gap between removing your old sensor and getting readings from the new one. Some users insert the new sensor 60 minutes before removing the old one to minimize the gap — though this means briefly wearing two sensors.
- Choose your application site carefully. Since the sensor stays on 50% longer, adhesion matters more. Areas with minimal movement and friction tend to work best. Consider using an overtape or adhesive patch for the last few days of wear.
- Keep your old sensors as backup. During the first month of the transition, keep a 10-day sensor as a backup in case you experience any issues with the 15-day version. After you’re comfortable with the switch, sell any remaining 10-day sensors to StripsUSA.
- Contact your supplier proactively. Don’t wait for your next shipment. Call your DME provider or pharmacy now to ask about switching. The sooner you start the process, the less overlap you’ll have between old and new supplies.
- Check your receiver compatibility. If you use a Dexcom receiver (instead of or in addition to a smartphone), it may need a software update to work with the G7 15 Day. Your DME provider can help with this.
We Also Buy These Diabetic Supplies
StripsUSA isn’t just for Dexcom sensors. We buy a wide range of diabetic supplies from sellers nationwide:
- Diabetic test strips — All major brands (OneTouch, Accu-Chek, FreeStyle, Contour, and more)
- FreeStyle Libre 2 and Libre 3 sensors
- Omnipod Dash and Omnipod 5 pods
- Medtronic pump supplies, sensors, and infusion sets
- Unused test strips of any brand
Learn where to sell diabetic supplies or find out who buys diabetic test strips in our informational guides.
Start Selling Your Extra Dexcom Sensors Today
Whether you’re switching from the G7 10-day to the 15-day, transitioning off the G6 entirely, or you simply ended up with more sensors than you need — StripsUSA makes it easy to turn those unused supplies into cash.
Browse our prices and build your shipment now. Free shipping, same-day payment, and a trusted buyer who purchases Dexcom supplies from sellers in all 50 states.
Have questions? Contact us anytime, or check out our FAQ page for answers to common questions about selling diabetic supplies.