What is Continuous Glucose Monitoring (CGM)?

A continuous glucose monitor (CGM) is an FDA-­approved device that provides continuous insight into glucose levels throughout the day and night. CGM also displays information about glucose direction and speed giving users additional information to help with their diabetes management. CGM also provides customizable alerts to warn the wearer of approaching glucose highs and lows. Studies have shown that CGM contributes to a decrease in HbA1c without increasing the risk for hypoglycemia.1

How is Dexcom CGM different from a blood glucose meter?

The traditional method of measuring glucose levels requires a fingerstick using a blood glucose meter (BGM). BGMs provide a glucose reading at a single point in time. The key difference between Dexcom CGM and BGM is that Dexcom CGM provides glucose readings throughout the day and night, including glucose speed and direction arrows that empower wearers with more information for more informed decision making*. Finally, Dexcom CGM is designed with alerts to warn the wearer of glucose highs and lows during critical times like playing, sleeping or exercising to help wearers catch high and lows before they become critical.

Here is an example of how Dexcom CGM information could impact glucose management decisions:

(The double arrows signal a rapid decline in glucose)

Based on the blood glucose meter (BGM) reading of 105, this person is likely to decide that no action is required. But, with a similar glucose level reading on the Dexcom CGM and two arrows facing down, the patient might decide to eat some carbohydrates to avoid having a hypoglycemic event.

*Fingerstick required prior to making treatment decisions

What is the Dexcom G5 Mobile CGM System?

The Dexcom G5 Mobile Continuous Glucose Monitoring (CGM) System is the first and only fully mobile CGM system approved by the U.S. Food and Drug Administration (FDA) for both adults and children as young as 2 years old. The Dexcom G5 Mobile CGM System is the newest CGM system available from Dexcom.

How does the Dexcom G5 Mobile CGM System work?

The Dexcom G5 Mobile CGM System features Bluetooth® wireless technology in the transmitter that enables direct transmission of CGM data to a receiver or compatible smart device. For a list of compatible smart devices, please refer to

The System features a small sensor that measures glucose levels just underneath the skin and a transmitter that is fastened on top of the sensor and sends data wirelessly to the System receiver or a compatible smart device. Out-of-range glucose alerts (with customizable sounds) may be sent to the user’s smart device, allowing for additional discretion and privacy. Additionally, using the Dexcom G5 Mobile App, users can share their glucose information with up to five individuals+for added support.

+Followers must separately download the Dexcom Follow App to view shared glucose information.

How many people can view the information from the Dexcom G5 Mobile CGM System?

Dexcom G5 Mobile CGM System users can invite up to five followers to remotely monitor their glucose information and receive alert notifications from almost anywhere using the Dexcom Follow App. The Dexcom Follow App is available as a free download through the Google Play store and the Apple® App Store and to the Apple Watch through the Apple Watch Store.

Who should not use the Dexcom G5 Mobile System?

Pregnant women and those on dialysis should not use the Dexcom G5 Mobile CGM System, as it has not been evaluated in these populations. Also, those who are critically ill should not use the device; it is not known how different conditions or medications common to the critically ill may affect the performance of the system.

Contact Dexcom

If you are a clinician and want to learn more about Dexcom’s Continuous Glucose Monitoring Systems, please fill out the form and a Dexcom representative will contact you.

If you are a Dexcom User or Patient, please contact Dexcom here.

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