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

Model Number	MT24078
Medical Device Problem Code	Low Audible Alarm (1016)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/08/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that an alert/notification settings issue occurred.No product or data was provided for evaluation.The allegation and a probable cause could not be determined.No injury or medical intervention was reported.
Additional Manufacturer Narrative
(b)(4).
Event or Problem Description
It was reported that an alert/notification settings issue occurred.An external visual inspection was performed and passed.Receiver charge and boot was performed and passed.Data log analysis was performed and passed.Functional tests were performed and passed.Alarm/alert manual test was performed and passed.Speaker/vibrator resistance was performed and passed.An internal visual inspection was performed and passed.Performance data was reviewed.An alert/ notification settings issue was not found within the investigation window.The probable cause could not be determined.No injury or medical intervention was reported.
Additional Manufacturer Narrative
(b)(4).

• 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 (Section G): DEXCOM, INC.; 6340 sequence dr.; san diego CA 92121
• Manufacturer Contact: jaime chavez ; 6340 sequence dr.; san diego, CA 92121 ; 8582000200
• MDR Report Key: 24194981
• Report Number: 3004753838-2026-078112
• Device Sequence Number: 8064805
• Product Code: QBJ
• UDI-Device Identifier: 00386270000590
• UDI-Public: (01)00386270000590(11)180914(10)5243208
• Combination Product (Y/N): N
• Initial Reporter State: MO
• Initial Reporter Country: US
• 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: Consumer
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 05/01/2026

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: MT24078
• Device Catalogue Number: STK-OR-001
• Device Lot Number: 5243208
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 01/08/2026
• Supplement Date Received by Manufacturer: 04/23/2026
• Initial Report FDA Received Date: 01/27/2026
• Supplement Report FDA Received Date: 05/01/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 09/14/2018
• 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: 70 YR
• Patient Sex: Male
• Patient Weight: 75 KG