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How CGM Works

Continuous glucose monitoring gives you a complete picture of your glucose, showing you where it is going and how fast it’s getting there.

Discover Dexcom CGM

Dexcom CGM products and accessories give you and your loved ones the insights to track and manage your diabetes successfully.2

Interested in getting a Dexcom CGM System?

If you are ready to see glucose in a whole new way with Dexcom CGM, provide us with a few details so we can get you started.

Get Dexcom CGM Support

Have questions about your CGM? Need help getting started? Browse the Support page to find the help you need.

Reorder Dexcom CGM Supplies

Do you know you can reorder Dexcom supplies online? Simply log in or create an account to get started.

CGM for Providers & Payers

Clinical Data & Resources

Research, findings and evidence on the proven benefits of CGM and Dexcom's diabetes management solutions, for clinicians, pharmacists and diabetes educators.

Economics & Reimbursement

Information helpful to employers, insurance providers, and consultants regarding reimbursement, cost justification, and financial benefits of CGM and Dexcom's solutions.

Meet Dexcom Warriors

The Dexcom community is full of Warriors who not only take control of their diabetes through proper glucose management, they also live life to the fullest—without limitations. Read their stories and share yours.

* CGM-based treatment requires fingersticks for calibration; may result in hypoglycemia if calibration not performed or symptoms/expectations do not match CGM readings. 

** The beneficiary may NOT use their phone or smart device for display of Continuous Glucose Monitoring (CGM) data and still be eligible for reimbursement by Medicare for Therapeutic CGM.

1 Click here for a list of compatible devices

2 Dexcom G5 Mobile Continuous Glucose Monitoring System, User’s Guide, 2015.


The Dexcom G5 Mobile Continuous Glucose Monitoring (CGM) System ("G5") is a glucose monitoring system indicated for the management of diabetes in persons age 2 years and older. The G5 is designed to replace fingerstick blood glucose testing for diabetes treatment decisions. The G5 also aids in the detection of episodes of hyperglycemia and hypoglycemia. The G5 is intended for single patient use and requires a prescription. CONTRAINDICATIONS Do not rely on the G5 CGM data if you have recently taken acetaminophen. Remove the G5 (sensor, transmitter, and receiver) before Magnetic Resonance Imaging (MRI), Computed Tomography (CT) scan, or high-frequency electrical heat (diathermy) treatment. The G5 is MR Unsafe. Do not bring any portion of the G5 into the MRI environment. WARNING CGM-based diabetes treatment decisions are only approved with the G5, not previous generations of Dexcom CGM systems. Calibrate at least once every 12 hours using a fingerstick. If your G5 does not display a sensor glucose reading and an arrow, or if you are getting inaccurate or inconsistent readings, take a fingerstick. If your glucose readings and alerts do not match your symptoms or expectations, take a fingerstick to confirm. Failure to do so may lead to hyperglycemia or hypoglycemia. The G5 is not approved for use in pregnant women, persons on dialysis or critically ill persons. If a sensor breaks and no portion of it is visible above the skin, do not attempt to remove it. Seek professional medical help if you have infection or inflammation on or near the sensor insertion point. Report broken sensors to Dexcom Technical Support. Sensor placement is not approved for sites other than under the skin of the belly (ages 2 years and older) or upper buttocks (ages 2-17 years). To “share” data, you need an internet connection and a separate compatible smart device running the Dexcom Follow App. Contact Dexcom Toll Free at 877-339-2664 or for detailed indications for use and safety information.