MAUDE Adverse Event Report: TANDEM DIABETES CARE T:SLIM X2 INSULIN PUMP WITH CONTROL-IQ TECHNOLOGY; ALTERNATE CONTROLLER ENABLED INSULIN INFUSION PUMP

Model Number	1000354
Medical Device Problem Code	Pumping Stopped (1503)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/05/2026
Type of Reportable Event	Malfunction
Event or Problem Description
Customer reported an issue with the pump indicating a cartridge alarm 20, but there was no adverse impact on the customer¿s blood glucose level.As the pump was out of warranty, technical support decided to replace it and advised the customer to use mdi as backup therapy.The customer was informed that they would receive a replacement pump with updated software and instructed to program their settings and connect their cgm to the new pump.Customer agreed to send insurance card pictures, and arrangements were made to provide an out-of-warranty loaner pump until the replacement arrived.

• Brand Name: T:SLIM X2 INSULIN PUMP WITH CONTROL-IQ TECHNOLOGY
• Common Device Name: ALTERNATE CONTROLLER ENABLED INSULIN INFUSION PUMP
• Manufacturer (Section D): TANDEM DIABETES CARE; 12400 high bluff drive; san diego CA 92130
• Manufacturer Contact: michael trier ; 12400 high bluff drive; san diego, CA 92130 ; 858 401-1451
• MDR Report Key: 24036752
• Report Number: 3013756811-2026-06418
• Device Sequence Number: 18410614
• Product Code: QFG
• UDI-Device Identifier: 00853052007325
• UDI-Public: 00853052007325
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• PMA/510(K) Number: K201214
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Consumer
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 01/12/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Model Number: 1000354
• Device Catalogue Number: 1000912
• Was Device Available for Evaluation?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 01/05/2026
• Initial Report FDA Received Date: 01/12/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 11/01/2019
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Age: 21 YR
• Patient Sex: Female