Contact Us
We have an extensive library of educational and self-help materials to help you get the most out of your Tandem Diabetes Care insulin pump.
Learn which continuous glucose monitoring (CGM) issues are specific to the sensor or the insulin pump, and which company to contact.
Tandem Diabetes Care offers a variety of ways to get the help you need with your insulin pump, on your schedule, including 24/7 technical support.
If you are already using Tandem products and need assistance, please call our Technical Support Team at (877) 801-6901. For other inquiries, please complete our form below.
Who to Contact for CGM Support
CGM Sensor
Dexcom Sensors
Issues include physical damage (e.g., broken, detached, missing sensor wire), no initial calibration, sensor failure during warmup, new sensor inserted but “No Restarts” (Alert 25) displayed, inaccurate CGM values, the calibration prompt will not clear, early sensor expiration, sensor failure after warmup, the pump displays “---“, the pump displays “Wait up to 3hrs”, the Dexcom Mobile App displays “Sensor Error”, or calibration errors. Please report the issue online or contact one of the support departments at Dexcom.
FreeStyle Libre 3 Plus Sensor
Issues including any intentional or unintentional removal of the sensor prior to expiration of the 15-day wear period (e.g., sensor falls off, knocked off due to contact with an object, removed due to error message, etc.) and for any sensor error message (e.g., “Scan Error Check Sensor”, “Sensor Error”, “Incompatible Sensor”, “Replace Sensor”), inaccurate CGM values, readings do not match physical symptoms, or sensor failure during initial warm up period, contact Abbott at (888) 963-8038. For pump and sensor connection issues, contact the Tandem Diabetes Care Techincal Support Team at (877) 801-6901.
CGM Sensor Application
Dexcom Sensors
Issues include physical damage (e.g., broken needle, cannula, or needle retraction issues), deployment issue, or painful insertion. Please report the issue online or contact one of the support departments at Dexcom.
FreeStyle Libre 3 Plus Sensor
Issues including physical damage to the sensor or applicator, sensor fall off during application, painful insertion (e.g., blood, soreness, or redness at the application site) contact Abbott at (888) 963-8038.
CGM Transmitter
Dexcom Sensors
Issues include pairing failure on the Dexcom Mobile App, unintended once per day calibration mode, physical damage, latch issues, difficulty inserting or removing transmitter, low transmitter battery alert, transmitter failed, overheating, or shocking. Please report the issue online or contact one of the support department at Dexcom.
FreeStyle Libre 3 Plus Sensor
Not applicable.
Insulin Pumps and Mobile Apps
Dexcom Sensors
Issues include a loss of connection only on the pump or only the pump displays an invalid Transmitter ID (Alert 29). Please contact the Tandem Diabetes Care Technical Support Team at (877) 801-6901. If the Dexcom Mobile App is also not receiving data, then Dexcom will handle these issues instead. Please report the issue online or contact one of the support departments at Dexcom.
FreeStyle Libre 3 Plus Sensor
Issues include errors that occur on the Tandem t:slim mobile app when attempting to activate the FreeStyle Libre 3 Plus sensor contact Abbott at (888) 963-8038.
Customer Support
We put as much effort into standing behind our products as we do into designing them. Based in the United States, our customer support team is staffed by highly trained, enthusiastic representatives.