MAUDE Adverse Event Report: Dexcom, Inc. Dexcom G7 Continuous Glucose Monitoring System

Catalog Number	SW12300
Medical Device Problem Code	Wireless Communication Problem (3283)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	09/08/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that signal loss occurred.It was determined that loss of connection was related to the mobile application.A review of the share logs was performed and signal loss was found within the investigation window.The allegation was confirmed.The probable cause was the transmitter and app were unable to complete a data transfer.No injury or medical intervention was reported.
Additional Manufacturer Narrative
(b)(4).

• Brand Name: Dexcom G7 Continuous Glucose Monitoring System
• Common Device Name: Continuous Glucose Monitor
• Manufacturer (Section D): Dexcom, Inc.; 6340 sequence dr.; san diego CA 92121
• Manufacturer Contact: jaime chavez ; 6340 sequence dr.; san diego, CA 92121 ; +1(858)200-0200
• MDR Report Key: 50943810
• Report Number: 3004753838-2026-263510
• Device Sequence Number: 9499137
• Product Code: QBJ
• UDI-Device Identifier: 00386270001863
• Combination Product (Y/N): N
• Initial Reporter Country: UK
• PMA/510(K) Number: K213919
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Consumer
• Type of Report: Initial
• Report Date (Section B): 09/30/2026

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 Catalogue Number: SW12300
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Initial Date Received by Manufacturer: 09/08/2026
• Initial Report FDA Received Date: 09/30/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• 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: Initial
• Patient Sequence Number: 1
• Concomitant Medical Products and Therapy/Usage Dates: Tandem tslim X2 insulin pump
• Patient Age: 17 MO
• Patient Sex: Male