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How Dexcom G6 CGM works.

How it works

The Dexcom G6 Continuous Glucose Monitoring (CGM) system sends your glucose numbers to a smart device* every 5 minutes without fingersticks or scanning. Trend arrows show where your numbers are heading and how fast, making it easier to make better management decisions.
If your glucose alerts and readings from the G6 do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions.
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G6 product family with applicator, receiver, sensor, smartphone and smartwatch

real-time readings without fingersticks

There’s a better solution to your diabetes management that will give you the power to make informed decisions in the moment without stopping to prick your finger. Getting started with Dexcom G6 is quick and easy.
If your glucose alerts and readings from the G6 do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions.
Compatible smart devices sold separately*
hand holding up the G6 sensor/transmitter with overpatch

small, discreet wearable

A slim sensor continuously measures glucose levels just beneath the skin and wirelessly sends your numbers to a display device via the attached transmitter.
G6 smartphone app screen beside receiver

options to view your numbers

View your real-time glucose numbers on your compatible smart device,* insulin pump,or a small Dexcom receiver. You can also use Dexcom G6 with compatible digital health apps and devices.
G6 app screen with features highlighted like - glucose reading, Dexcom share, trend arrow, high glucose alert level, trend graph, low glucose alert level, log daily activities, customize your alerts

a closer look at the Dexcom G6 mobile app

The app displays your glucose numbers at a glance on a smart device,* and customizable alerts can notify you before you go too low or when you're too high.
Man and woman looking at Dexcom G6 on phone.

simple alerts that keep you informed

The Dexcom G6 app gives you the flexibility to customize alert sounds and settings to best fit your lifestyle. It can also deliver alerts before you go too low and when you’re too high, enabling you to gain greater glucose control and peace of mind.
Smartphone screen showing the CGM app High Glucose Reading Alert
urgent low soon alert image


Provides a 20-minute advance warning of when you’ll reach 55 mg/dL so that you can act quickly and avoid a potential hypoglycemic event.
urgent low alert screen


Alerts when sensor reading is 55 mg/dL or below.
alerts schedule screen


Allows you to customize a second set of alerts for other situations and needs.
customizable alerts screen


During initial set up, you’ll establish low and high alert levels so you can get a Low Alert or High Alert when readings are below or above target range. You can also choose the sound you want each alert to make.
woman doing yoga

proven to lower A1C

Dexcom CGM helps you spend more time in range, and is proven to lower A1C and reduce hyper- and hypoglycemia.1,2
Spend more time in range with Dexcom G6 CGM.

the power of time in range

Studies show that Dexcom CGM use is proven to increase time in range (TIR).1,2 TIR is a powerful supplement to A1C because it shows a more complete picture of glucose variations.
Both of the graphs below represent people who have what is considered to be a healthy A1C of 7%. Looking at time in range reveals that although both have the same A1C, one has greater glucose control than the other.
Dexcom Clarity screen with dashboard showing data on glucose levels, time in range, sensor usage

track your progress with Dexcom Clarity with the #1 recommended diabetes software3

Managing diabetes can be complex. But with Dexcom Clarity, tracking your progress makes things simpler. You’ll be able to view your data in easy-to-read graphs, see monthly and daily trends, and gain insights from other statistics. You can even share this data with your healthcare provider right from the Dexcom Clarity app.||,¶
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Get Started with Dexcom CGM

Please fill out the form below to help us determine if the Dexcom CGM System is right for you or your loved one. A customer service representative of Dexcom, or a service provider on behalf of Dexcom, may follow up with you to process a full insurance benefits check or to discuss other Dexcom products, services or programs, after reviewing your information.

Personal & Diabetes Information

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Have Questions?

Our customer support representatives are available to help answer your questions at 888-738-3646.

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*For a list of compatible devices, visit
If your glucose alerts and readings from the G6 do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions. To learn more about insulin pump integrations and compatibility with Dexcom G6, visit §Separate Follow app and internet connection required. Users should always confirm readings on the Dexcom G6 app or receiver before making treatment decisions. ||Patient must first sync their Dexcom G6 data with the Dexcom Clarity app and consent to share their data with their healthcare provider. An internet connection is required for patients to send their glucose data to Dexcom Clarity via a compatible smart device. Do not use Dexcom Clarity for treatment decisions such as dosing insulin. The user should follow instructions on the continuous glucose monitoring system.
1 Beck RW, et al. Ann Intern Med. 2018;168(7):526-7. 2 Welsh JB, et al. Diabetes Technol Ther. 2019;21(3):128-132. 3 dQ&A Diabetes Connections Q1 2020. 2020.
BRIEF SAFETY STATEMENT Failure to use the Dexcom G6 Continuous Glucose Monitoring System (G6) and its components according to the instructions for use provided with your device and available at and to properly consider all indications, contraindications, warnings, precautions, and cautions in those instructions for use may result in you missing a severe hypoglycemia (low blood glucose) or hyperglycemia (high blood glucose) occurrence and/or making a treatment decision that may result in injury. If your glucose alerts and readings from the G6 do not match symptoms or expectations or you’re taking over the recommended maximum dosage amount of 1000mg of acetaminophen every 6 hours, use a blood glucose meter to make diabetes treatment decisions. Seek medical advice and attention when appropriate, including for any medical emergency.
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