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What is Continuous Glucose Monitoring (CGM)?

CGM gives users a more complete picture of their glucose levels and trends. Unlike a blood glucose meter which provides just a single reading with each fingerstick, CGM shows people with diabetes where their glucose is headed and how fast.

urgent alert

Continuous insight, day and night

CGM helps minimize the guesswork that typically comes from making decisions based solely on a single number from a blood glucose meter. CGM systems display information about glucose direction and rate of change up to every 5 minutes, providing people with critical information to help inform their diabetes management decisions.

rtCGM data is continuous and offers more data than a standard glucose meter

More peace of mind

Every day, people are frequently making decisions about their diabetes – when they eat, go for a run, or go to bed. With a Dexcom CGM system, these decisions are not made blindly, but instead with the knowledge of what their current glucose level is, where it's headed, and how fast. Dexcom G7’s customizable alerts and alarm can warn users if glucose levels go high or low.

peace of mind
The Benefits of Dexcom CGM

Our most advanced real-time CGM system that continuously measures glucose levels up to every 5 minutes, and sends readings wirelessly to a smart device or optional receiver – without the need for routine fingersticks* or scanning.

Reduces A1C
Reduces A1C

Several studies have demonstrated that wearing a Dexcom CGM system is associated with significant A1C reductions.1-5

Reduces hypoglycemia
Reduces Hypoglycemia

Hypoglycemia presents a significant risk to the health and safety of your patients. Not only can Dexcom CGM use reduce A1C, but numerous studies have also shown it can also decrease time spent in hypoglycemia.1-6

Increases time in range
Increases Time in Range

Real-time CGM is clinically proven to help people increase the amount of time spent in range (TIR) by as much as five hours per day, regardless of their insulin delivery method.1-3,7

Reduces fear of hypoglycemia
Reduces Fear of Hypoglycemia

Dexcom CGM systems are equipped with alerts that can warn users of lows and highs. These warnings can provide an added layer of protection, day or night, giving people with diabetes and their caregivers more peace of mind and reducing the fear of going low.6-8

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Predictive Urgent Low Soon alert

Dexcom CGM sends a warning, up to 20 minutes in advance, when glucose is headed towards severe hypoglycemia (<3.1 mmol/L), so people can take immediate action.9

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Easier than ever to use – and to continue using

Easy to prescribe, easy to insert and easy to customize. 9 out of 10 users stay on Dexcom rtCGM after 1 year.‡,10



Dexcom G7 CGM Components

The Dexcom G7 CGM System contains three main components:

  1. All-in-One Sensor – Sensor monitors interstitial glucose levels through a small wire inserted just underneath the skin and sends glucose data up to every 5 minutes wirelessly via Bluetooth to the wearer's display device.
  2. Applicator – Compact one-click applicator.
  3. Display Device – Displays glucose readings and trend data on a compatible smart device§ or optional touchscreen receiver.

Dexcom G7 also provides customizable alerts which can warn the wearer of approaching glucose highs and lows.

Dexcom Family

Dexcom G6 CGM Components

The Dexcom G6 CGM System contains three main components:

  1. Sensor – inserted just underneath the skin with a simple one-touch applicator, the sensor measures interstitial glucose levels.
  2. Transmitter – fastened on top of the sensor, this component sends data wirelessly to a display device.
  3. Display Device – displays glucose readings and trend data on a compatible smart device§ or optional touchscreen receiver.

Dexcom G6 also provides customizable alerts which can warn the wearer of approaching glucose highs and lows.

The three components of the Dexcom G6: G6 Sensor, G6 Transmitter, and a display device
Keep up with the latest news and information.

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* If glucose alerts and readings from the Dexcom G7 do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions.
† For a list of compatible devices, please visit Use of the smart watch requires the Dexcom G6 App on a compatible smartphone. 
‡ Based on data from Dexcom CGM users in the U.S.

1 Beck RW, et al. JAMA. 2017;317(4):371-378.
2 Beck RW, et al. Ann Intern Med. 2017;167(6):365-374.
3 Martens T, et al. JAMA. 2021;325(22):2262-2272.
4 Laffel LM, et al. JAMA. 2020;323(23):2388-2396.
5 Welsh JB, et al. J Diabetes Sci Technol. 2022:19322968221099879.
6 Heinemann L, et al. Lancet. 2018;391:1367-77. 
7 Šoupal J, et al. Diabetes Care. 2020;43:37–43. 
8 Polonsky WH, et al. Diabetes Technol Ther. 2021;23(3):195-202.
9 Dexcom G7 CGM System User Guide, 2023. 
10 Dexcom, U.S. data on file, 2022.