MAUDE Adverse Event Report: DEXCOM, INC. DEXCOM G6 CONTINUOUS GLUCOSE MONITORING SYSTEM

Model Number	9445-02
Medical Device Problem Code	Wireless Communication Problem (3283)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	04/01/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that signal loss occurred.It was indicated the patient started their transmitter past the 'use by' date, which is misuse of the device.Performance data was reviewed.The allegation was confirmed due to the finding of signal loss over an hour within the investigation window.The probable cause was the transmitter and app were unable to restore the connection.No injury or medical intervention was reported.
Additional Manufacturer Narrative
(b)(4).
Additional Manufacturer Narrative
(b)(4).
Event or Problem Description
Subsequent to the initial mdr, a correction is required.

• Brand Name: DEXCOM G6 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 ; 8582000200
• MDR Report Key: 24991288
• Report Number: 3004753838-2026-139180
• Device Sequence Number: 10399230
• Product Code: QBJ
• UDI-Device Identifier: 00386270000385
• UDI-Public: (01)(11)250301(17)260831(10)1825076005
• Combination Product (Y/N): N
• Initial Reporter Country: GB
• PMA/510(K) Number: DEN170088
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Foreign,Consumer
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 05/05/2026

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: 9445-02
• Device Catalogue Number: STT-GS-003
• Device Lot Number: 19482900
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 04/21/2026
• Supplement Date Received by Manufacturer: 04/26/2026
• Initial Report FDA Received Date: 04/25/2026
• Supplement Report FDA Received Date: 05/05/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 11/20/2025
• 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: Initial
• Patient Sequence Number: 1
• Patient Age: 20 YR
• Patient Sex: Female