Collection: CGM Sensors

Most modern CGM sensors last between 10 and 15 days, depending on the brand. Dexcom G7 sensors run for 10 days plus a 12-hour grace period, FreeStyle Libre 3 lasts 14 days, and Dexcom G6 also runs 10 days. After that, you swap in a fresh one and keep going. We make sure you always have what you need on hand through automatic resupply.

We typically ship a fresh supply every 30 to 90 days based on your prescription and what your insurance allows. You don't have to remember to reorder. We track your usage and reach out before you run low. If your shipment timing ever feels off, justlet us know and we'll adjust.

Most major insurance plans cover CGM sensors for people with type 1 or type 2 diabetes who use insulin. Medicare also covers sensors for qualifying patients. Coverage rules and copays vary, so we run a benefits check before your first shipment so there are no surprises later.

Our Resources page has more information on insurance and CGMs.

Different sensors have different approved wear sites. Dexcom sensors are typically worn on the abdomen or upper arm (and the back of the upper arm for kids), while FreeStyle Libre is worn on the back of the upper arm. Choosing a site with a bit of cushioning and rotating sites with each new sensor helps your skin stay happy.

Our Learning Center has practical tips on site selection and adhesion.

Most people are pleasantly surprised by how little they feel. The applicator inserts a tiny, flexible filament under your skin in a fraction of a second, and many users describe it as a quick pinch or nothing at all. If you find yourself nervous about insertion, you're in good company. The first one feels like a leap, then it becomes routine.

Yes to all three. CGM sensors are designed to be water resistant for showering, swimming, and sweating through workouts. The adhesive holds up well in most conditions, and a few simple tricks (like patting it dry instead of rubbing) can extend wear time. If you find your sensors falling off early, our team has recommendations for overpatches and skin prep in the Learning Center.

It happens occasionally. Manufacturers typically replace sensors that fail early when you report the issue with the lot or serial number. Our support team can walk you through how to file a replacement claim with the manufacturer so you don't lose any wear time.

Today's CGM sensors are remarkably accurate. Most read within roughly 8 to 10 percent of a comparable lab value, and they've been studied extensively in clinical trials. They're FDA-cleared for treatment decisions, which means many users no longer need routine fingersticks. Accuracy can vary slightly during very rapid glucose changes or in the first day of wear, which is normal.