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

Model Number	MT24078
Medical Device Problem Code	Unable to Obtain Readings (1516)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	02/25/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
(b)(4).
Event or Problem Description
It was reported that error icon display 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 error icon displayed occurred.Product was provided for investigation.An external visual inspection was performed and passed.The receiver charge test was performed and passed.The receiver boot test was performed and passed.Functional test was performed and passed.An internal visual inspection was performed and passed.The log was not downloaded for review.The allegation was confirmed.The probable cause could not be determined.No injury or medical intervention was reported.

• 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: 24572007
• Report Number: 3004753838-2026-110029
• Device Sequence Number: 9560915
• Product Code: QBJ
• UDI-Device Identifier: 00386270000590
• UDI-Public: (01)00386270000590(11)220131(10)P12732078
• Combination Product (Y/N): N
• Initial Reporter State: KY
• 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): 06/04/2026

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: P12732078
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Follow-Up
• Initial Date Received by Manufacturer: 02/25/2026
• Supplement Date Received by Manufacturer: 05/12/2026
• Initial Report FDA Received Date: 03/11/2026
• Supplement Report FDA Received Date: 06/04/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 01/31/2022
• 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: 55 YR
• Patient Sex: Female
• Patient Weight: 79 KG