MAUDE Adverse Event Report: Tandem Diabetes Care Tandem Mobi Insulin Pump with Control-IQ+ Technology; Alternate Controller Enabled Insulin Infusion Pump

Model Number	1004000
Medical Device Problem Code	Mechanical Problem (1384)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	08/11/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that a cartridge alarm occurred during the load sequence.Customer loaded a new cartridge to resolve the issue.There was no adverse impact to the customer¿s blood glucose level.
Additional Manufacturer Narrative
In use at the time of the event: cgm model: g6.Mobile os: ios / ios iphone 11 / 2.1.3 / ios 18.4.1.

• Brand Name: Tandem Mobi 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: john connell ; 12400 high bluff drive; san diego, CA 92130 ; +1(858)224-6281
• MDR Report Key: 50354210
• Report Number: 3013756811-2026-151260
• Device Sequence Number: 10146881
• Product Code: QFG
• UDI-Device Identifier: 00389152408170
• UDI-Public: 00389152408170
• Combination Product (Y/N): N
• Initial Reporter State: VA
• Initial Reporter Country: US
• PMA/510(K) Number: K240309
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Consumer
• Type of Report: Initial
• Report Date (Section B): 08/20/2026

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: 1004000
• Device Catalogue Number: 1014081
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 08/20/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 02/10/2025
• 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
• Concomitant Medical Products and Therapy/Usage Dates: Humalog - Insulin; Tandem - Cartridge; Unomedical - Infusion Set
• Patient Age: 51 YR
• Patient Sex: Female