The Recall Desk
CriticalFDA (Devices)·Z-2343-2025·Announced 2025-09-03

Insulin pumps recalled over malfunction that stops insulin delivery and alerts

Tandem t:slim X2 insulin pumps built with Revision A and B speakers may hit Malfunction 16, losing audible alerts and stopping insulin delivery. The FDA classified the action as Class I. 171,750 units are affected.

What this means for you

Highest-severity recall. Risk of serious injury or death is documented or strongly suspected. Stop using the product now and follow the agency's instructions.

Our severity reasoning: The rubric assigns 5 to any FDA Class I recall, and the FDA classified this insulin pump malfunction as Class I.

Plain-English summary

Battery operated t:slim X2 infusion pumps are being recalled across a wide range of references, including REF 1000911 (t:slim X2 G5 replacement refurbished), 1003808 (t:slim X2 G5 Classic replacement refurbished), 1004219 (t:slim X2 Basal-IQ mg/dl), 1004484 (clinical use only), 1005611, 1005613, 1005615 and 1005617 (Control-IQ variants), 1006379 (Basal-IQ 6.4 refurbished replacement) and 1006402 and 1006406 (Control-IQ 7.4). The recall covers 171,750 units distributed in the United States including Puerto Rico and in more than 20 other countries.

Insulin pumps manufactured with speakers from Revision A and B may experience a malfunction identified as "Malfunction 16". The manufacturer states this prevents audible alerts and causes the pumps to become inoperable and stop infusing insulin, which could result in a hyperglycemic event that may lead to injury and/or hospitalization. The FDA classified the action as Class I, its most serious category.

Pump users should check their pump against the recall notice and follow the manufacturer's instructions, keeping a backup insulin delivery method available. Anyone whose pump has stopped delivering insulin should contact their healthcare provider.

The recalled product

Product
Battery Operated infusion pumps. t:slim X2 G5, Replacement, Refurbished, REF: 1000911; t:slim X2 GS Classic, Replacement, Refurbished, REF: 1003808; t: slim X2, Basal-IQ, mg/dl, REF: 1004219; Pump, t:slim X2, Clinical Use Only, REF: 1004484; Pump, t:slim X2, Control-IQ, REF:
Manufacturer
Tandem Diabetes Care, Inc.
Hazard
  • device-malfunction
  • insulin-delivery-stop
  • alert-failure
  • hyperglycemia
  • class-i

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Lot numbers (20)

  • REF/UDI-DI: 1000911/t:slim X2 G5
  • Replacement
  • Refurbished/00853052007318
  • 1003808/t:slim X2 GS Classic
  • Refurbished/ 00853052007981
  • 1004219/t: slim X2
  • Basal-IQ
  • mg/dl/ 00853052007998
  • 1004484/Pump
  • t:slim X2
  • Clinical Use Only
  • 1005611/Pump
  • Control-IQ
  • mmoUL/ 00850006613304/
  • 1005613/Pump
  • mmoUL
  • Refurbished Replacement/ 00850006613311/
  • 1005615/Pump
  • mg/dl/ 00850006613328/
  • 1005617/Pump

Distribution

Distributed nationwide across the United States.