How long does the DexCom CGM sensor last?

Asked 2 years ago
The DexCom continuous glucose monitoring (CGM) sensors are designed to provide continuous glucose readings for a specific duration. Typically, the lifespan of a DexCom CGM sensor is about ten days. During this period, users can upload data and monitor their glucose levels with relative ease. It is important to remember that individual experiences may vary; some users may find that their sensor performs well beyond the ten-day timeframe, while others may need to replace it sooner if they experience issues such as discomfort or inaccurate readings. In addition to the standard sensor lifespan, it is crucial to follow the manufacturer's guidelines for sensor insertion and usage to ensure optimal performance. DexCom provides instructions on how to properly place the sensor and maintain its functionality over its lifespan. Users are also encouraged to regularly check their blood glucose levels to ensure that the CGM readings align with their actual levels, particularly if they notice any discrepancies. For those seeking further details or assistance, information can typically be found on the official DexCom website.
Adam Goldkamp is the editor / author responsible for this content.
Answered Jul 5, 2025

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