How often do I need to calibrate my DexCom CGM?

You need to calibrate your DexCom Continuous Glucose Monitoring (CGM) system twice a day. DexCom recommends calibration every 12 hours to ensure accurate glucose readings. Typically, you should calibrate the CGM when your blood glucose is stable or within your target range. It's important to calibrate even if your CGM readings are matching your blood glucose values to maintain accuracy. Calibration involves using a fingerstick blood sample to take a glucose reading and entering it into the DexCom receiver or app. Dexcom also advises users to calibrate whenever the CGM readings are inconsistent or they suspect inaccurate readings due to symptoms not aligning with the sensor data. Always consult the user manual or reach out to the DexCom support team for specific calibration instructions.