Dexcom will launch its new Dexcom G7 15 Day Continuous Glucose Monitoring (CGM) System in the United States on December 1, 2025. The FDA has cleared the system for adults 18 and older with diabetes. The sensor will last up to 15.5 days including a 12 hour grace period. This gives the G7 a slight edge above its direct competitor Abbott’s Libre 3 Plus CGM which lasts 15 days.

Dexcom also reports improved accuracy, with an overall MARD of 8.0%. Clinical data shows that while most sensors reach the full wear period. About 25% did not last the full 15 days even when used correctly, which means real world performance will be something users pay close attention to once the launch begins.

Dexcom plans to start the rollout through durable medical equipment (DME) suppliers, and retail availability will follow shortly after. The company is already coordinating with pump partners so the G7 15 Day will work with automated insulin delivery systems at launch. It is designed to integrate smoothly with wearables like Apple Watch and digital health apps, which continues Dexcom’s effort to build a more connected and easier to use ecosystem.

Dexcom has just received FDA clearance for Smart Basal, a new feature that uses full CGM data to guide daily basal insulin dose adjustments for adults with type 2 diabetes. The tool will live inside the G7 15 Day app and aims to make starting or adjusting basal insulin less stressful by offering clearer guidance and more personalized recommendations.

Dexcom is currently dealing with concerns raised in a proposed class action for the Dexcom G7 and must regain trust within the community regarding reliability of the updated sensor. We spoke to Dexcom where they addressed questions surrounding sensor issues and product recalls.

The company is preparing new software features, including its upcoming Trends tab meant to help users better understand their glucose patterns by layering in activity and other context.

With the G7 15 Day arriving on December 1, many people will soon be able to try a longer lasting and more accurate sensor. The next few months will show how it performs in real life and how well it fits into the growing digital ecosystem that Dexcom is building. Let us know what you think in the comments below!

Disclaimer: Diabetech content is not medical advice—it’s for educational purposes only. Always consult with a physician before making changes to your healthcare.