Tandem Diabetes has leveled up insulin pump technology with a new algorithm and expanded its continuous glucose monitor (CGM) compatibility. The new algorithm, Control IQ+, is built upon the previous Control IQ algorithm, offering several updated features. In June 2025, Tandem diabetes announced Libre 3+ is joining the family of compatible CGMs. Let’s uncover the details of this new algorithm and review the compatible CGM options.
Tandem Control IQ+
Control IQ+ introduces several new features designed to enhance glycemic control.¹ These features are available for both the Tandem t:slim X2 and Mobi insulin pumps.
✅Age: Control IQ+ is available for ages 2 years and up.
✅Indication: This algorithm has approval for both Type 1 Diabetes and Type 2 Diabetes.
✅Extended Bolus: This feature allows for extended boluses for up to 8 hours.
✅Weight Range: The new algorithm now includes new extended weight ranges from 20-440 lbs.
✅Total Daily Dose of Insulin: For those with high insulin requirements, the total daily dose of insulin is now up to 200 units per day.
✅Temp Basal Rate: The temp basal rate feature can be used for up to 72 hours while still staying in Control IQ+. Now users don’t need to stop the automated insulin delivery mode when requiring a temp basal rate for short-term needs like illness or exercise. The algorithm will continue to adjust the basal rate and give boluses if needed based on blood glucose levels.²
CGM Compatibility
Tandem announced in June 2025 the approval of Libre 3+ to its current family of compatible CGMs. Per Tandem Diabetes Care, the Libre 3+ will be compatible with the t:slim X2 pump and is only available through an early access program, with a broader access announcement expected later this year.³ Currently, the compatible CGMs are:
🩸Dexcom G6 (For t:slim X2 and Mobi)
🩸Dexcom G7 (For t:slim X2 and Mobi)
🩸Libre 2 + (For t:slim X2 only)
The Educator’s Perspective
Now that you know what’s new with Control IQ+ technology and the current CGM compatibility, you can confidently help clients develop a personalized approach to insulin pump management. Diabetes care and education specialists can also help existing Tandem insulin pump users update their software to the new Control IQ+ algorithm. Individuals living with diabetes depend on your expertise to guide them through the maze of diabetes technology. During education sessions, it is essential to review the basics of how the algorithm works and specific features of the pump. Additionally, review proper carbohydrate counting skills, learn how to administer food and correction boluses, and understand how to prevent and manage hypoglycemia.
Join us at one of our live or virtual events to expand your practice as a diabetes care and education specialist. Check out the events page to see all the exciting options!
References
- Tandem Diabetes Care. Tandem Diabetes Care launches new control-IQ+ automated Insulin delivery technology in the United States [News Release]. Retrieved August 1, 2025, from https://investor.tandemdiabetes.com/news-releases/news-release-details/tandem-diabetes-care-launches-new-control-iq-automated-insulin.
- Tandem Diabetes Care. Temp rate. Retrieved August 1, 2025, from https://www.tandemdiabetes.com/support-center/pumps-and-supplies/automated-insulin-delivery/article/temp-rate#:~:text=Temp%20Rate%2C%20also%20known%20as,delivers%2060%25%20of%20that%20value.
- Tandem Diabetes Care. Tandem Diabetes Care Announces t:slim X2™ insulin pump compatibility with Abbott’s FreeStyle Libre® 3 Plus sensor in the United States [News Release]. Retrieved August 1, 2025, from https://investor.tandemdiabetes.com/news-releases/news-release-details/tandem-diabetes-care-announces-tslim-x2tm-insulin-pump.
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