t:slim X2 Insulin Pump with Interoperable Technology

FDA Device Recall #Z-1519-2025 — Class I — February 27, 2025

Recall Summary

Recall Number Z-1519-2025
Classification Class I — Serious risk
Date Initiated February 27, 2025
Status Ongoing
Voluntary Voluntary: Firm initiated

Recalling Firm

Firm Tandem Diabetes Care, Inc.
Location San Diego, CA
Product Type Devices
Quantity 63 units

Product Description

t:slim X2 Insulin Pump with Interoperable Technology

Reason for Recall

A software defect in Version 7.9 of the pump software for Tandem t:slim X2 and Tandem Mobi pumps, when used with Control IQ+ technology, will cause the pump to incorrectly interpolate glucose trends when the Estimated Glucose Value (EGV) is above 255 mg/dL at the start or end of a gap in data collection due to a lapse in connection from a paired continuous glucose monitor (CGM) sensor, which can lead to under-delivery or over-delivery of insulin based on inaccurate result leading to severe cases of hypoglycemia or hyperglycemia.

Distribution Pattern

US: AZ, CA, CO, CT, FL, HI, IA, ID, IL, IN, MD, ME, MI, MO, MS, NC, ND, NE, NJ, NM, NV, NY, OH, PA, TX, UT, VA, WA, WI OUS: N/A

Lot / Code Information

Software versions 7.9/UDI: 00389152407012

Other Recalls from Tandem Diabetes Care, Inc.

Recall # Classification Product Date
Z-1636-2026 Class II Tandem pumps are battery-operated infusion pump... Jan 30, 2026
Z-0427-2026 Class I Tandem Mobi Insulin Pump: Description/Catalog:... Oct 6, 2025
Z-0232-2026 Class II t:slim X2 insulin pump with Interoperable Techn... Aug 5, 2025
Z-2343-2025 Class I Battery Operated infusion pumps. t:slim X2 G5, ... Jul 21, 2025
Z-2621-2025 Class II t:slim X2 Insulin Pump with Interoperable Techn... Jul 3, 2025

Frequently Asked Questions

A software recall means the device's embedded software or firmware has a defect that could affect its performance or safety. Many software recalls are corrected through firmware updates that can be applied without physically replacing the device. For implantable devices, the update may be delivered wirelessly during a routine clinic visit. For external devices, the manufacturer may provide updated software files or replacement units. Contact your healthcare provider to determine whether your specific device and software version are affected and what action is recommended.

Class I recalls indicate a reasonable probability of serious adverse health consequences or death from the defect. Class II recalls involve products that may cause temporary or medically reversible adverse health consequences, or where serious consequences are remote. Class III recalls cover products not likely to cause any adverse health consequences, typically involving technical regulatory violations. The classification guides urgency — Class I recalls require immediate action, while Class III may simply involve returning a product or acknowledging a labeling change. Always read the specific recall notice for recommended patient actions.

Report problems with medical devices to the FDA through MedWatch at 1-800-FDA-1088 or online at FDA.gov/safety/medwatch. Healthcare facilities are required by law to report device-related serious injuries and deaths. Patients and consumers can also report voluntarily. Include the device name, manufacturer, model number, and a description of the problem and any patient outcome. Reports from patients and clinicians help the FDA identify emerging safety signals and may trigger investigations that lead to recalls of dangerous devices.

What Should You Do?

Stop using this device if you are affected by this recall. Contact your healthcare provider and the manufacturer immediately for guidance. Report adverse events to FDA MedWatch.