Collection: CGM Transmitters

The transmitter is the small device that snaps onto your sensor and sends glucose readings wirelessly to your reader or phone every few minutes. It's the piece that turns your sensor into a connected device. Without it, the sensor sits there quietly without sharing any data.

For many CGM systems, yes. Dexcom and Abbott FreeStyle Libre both offer compatible smartphone apps that let your phone act as the reader, as long as your device meets their compatibility requirements. Some people prefer a dedicated reader because it keeps glucose data separate from their phone, while others love having everything in one place.

You can find a list of compatible phones and how the apps work on our Education page.

Most insurance plans, including Medicare, cover CGM readers when they're prescribed for diabetes management. Coverage details, deductibles, and copays vary by plan, so we always verify your benefits before shipping anything. We handle the paperwork and the back-and-forth with your insurance for you.

Visit our Resources page for more on what to expect during the insurance process.

The transmitter is the small piece that sits on top of yoursensorand sends glucose data wirelessly. The reader is what catches that data and displays it for you. Think of the transmitter as the messenger and the reader as the inbox. Each plays a different role, and both work together to give you the readings you need.

Most CGM readers last for years with normal use. They run on rechargeable or replaceable batteries, and manufacturers typically push software updates to keep them current. If your reader stops working or gets damaged, give us a call and we'll help you sort out a replacement quickly.

First, no panic. Many people switch to using their phone temporarily while a replacement is on the way. Reach out to our support teamand we'll work with your insurance and the manufacturer to get you a new one as quickly as possible.

Absolutely, and this is one of the best parts of modern CGM technology. Most systems let you set up data sharing through their companion apps so loved ones can see your numbers in real time, and your healthcare provider can review trends between appointments. It can be a real comfort for parents of kids with diabetes and for adult children of older parents.

Setup walkthroughs for each system are available in our Learning Center.