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What is (CGM) Continuous Glucose Monitoring?

A CGM system provides continuous insight into glucose levels throughout the day and night. The device displays information about glucose direction and rate of change providing users additional information to help with their diabetes management. Studies have shown that CGM systems may help reduce your A1C and reduce your risk for hypoglycemia, whether you are on insulin injections or pump therapy.1


Dexcom Continuous Glucose Monitoring helps minimize the guesswork that comes from making decisions based solely on a number from a blood glucose meter reading, for better diabetes management.*

The Benefits of CGM

Unlike a blood glucose meter (BGM), which provides just a single glucose reading, CGM systems can provide real-time, dynamic glucose information every five minutes — up to 288 readings in a 24-hour period. You can gain valuable insight about your glucose levels, rate and direction of change, giving you additional insight to proactively manage your diabetes. 

A1C Reduction

CGM has proven to be the best outpatient glycemic management system for reducing A1C. Type 1 diabetics experience an average A1C reduction of 1.3%.**2 

Reduced Hypoglycemia

Not only can CGM use reduce A1C, numerous studies have shown it can also decrease your time spent in hypoglycemia.1-3


Active Monitoring at Night

The Dexcom CGM system is equipped with alerts that can warn you of approaching lows and highs. 


Discover Dexcom CGM

The Dexcom G6 CGM System consists of three parts:


1. a small sensor that measures glucose levels just underneath the skin
2. a transmitter that fits onto the sensor and sends data wirelessly to your display device
3. a small receiver or compatible smart device† that displays real-time glucose information


The Dexcom G6 CGM also provides customizable alerts to warn the wearer of approaching glucose highs and lows. 

Take a deeper dive

Dive into the select CGM episodes below to learn more about the value and benefits of CGM. 

Continuous Glucose Monitoring: The basics

How the Dexcom CGM Works

The Benefits of Dexcom CGM

Taking the Next Step with Dexcom CGM

Interested in getting a Dexcom CGM System?

If you are ready to take the next step, the process is simple. Provide us with a few details and we will contact you to begin your order.

* 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.

** MDI patients with baseline A1C ≥ 8.5%

† Click  here for a list of compatible devices.

‡ Dexcom receiver is included in system, smart devices sold separately.

1 Soupal J, Petruzelkova L, Flekac M, et al. Comparison of Different Treatment Modalities for Type 1 Diabetes, Including Sensor-Augmented Insulin Regimens, in 52 Weeks of Follow-Up: A COMISAIR Study. Diabetes Technol Ther. 2016;18(9):532-538.

2 Juvenile Diabetes Research Foundation Continuous Glucose Monitoring Study Group. Continuous Glucose Monitoring and Intensive Treatment of Type 1 Diabetes, N Engl J Med. 2008: 359(14); 1464-1476.

3 Beck RW, Riddlesworth T, Ruedy K, et al. Effect of continuous glucose monitoring on glycemic control in adults with type 1 diabetes using insulin injections: The diamond randomized clinical trial. JAMA. 2017;317(4):371-378. doi:10.1001/jama.2016.19975.



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.