MAUDE Adverse Event Report: SENSEONICS INC. EVERSENSE SENSOR; EVERSENSE CONTINUOUS GLUCOSE MONITOR SYSTEM

Model Number	103606-620
Medical Device Problem Code	Imprecision (1307)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	01/19/2026
Type of Reportable Event	Malfunction
Event or Problem Description
On april 2, 2025, senseonics was made aware of an incident where user experienced sensor inaccuracy.No injury or medical intervention was reported.
Additional Manufacturer Narrative
On april 2, 2026, the user reported discrepancies between blood glucose (bg) and sensor glucose (sg) readings.Review of available sensor data in the data management system (dms) indicated that the observed decrepancies occurred during the initial post-insertion period (early wear time), which is described in the user guide and supported by clinical performance data as an expected phase of sensor stabilization.The user was educated about this adjustment period and advised to continue using the system, entering any additional calibrations as prompted by the system.The user was informed that the system is expected to improve following stabilization.The user acknowledged this guidance and agreed to continue use of the system as instructed.

• Brand Name: EVERSENSE SENSOR
• Common Device Name: EVERSENSE CONTINUOUS GLUCOSE MONITOR SYSTEM
• Manufacturer (Section D): SENSEONICS INC.; 20451 seneca meadows parkway; germantown MD 20876 7005
• Manufacturer (Section G): SENSEONICS INC.; 20451 seneca meadows parkway; germantown MD 20876 7005
• Manufacturer Contact: vallikannu somasundaram ; 20451 seneca meadows parkway; germantown, MD 20876-7005
• MDR Report Key: 25673816
• Report Number: 3009862700-2026-02352
• Device Sequence Number: 10406834
• Product Code: SBA
• UDI-Device Identifier: 00817491024305
• UDI-Public: 00817491024305
• Combination Product (Y/N): Y
• Initial Reporter Country: US
• PMA/510(K) Number: P160048
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Consumer
• Initial Reporter Occupation: Other
• Type of Report: Initial
• Report Date (Section B): 06/30/2026

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 Model Number: 103606-620
• Device Catalogue Number: FG-7502-00-301
• Device Lot Number: 01G057S
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 04/02/2026
• Initial Report FDA Received Date: 06/30/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 12/01/2025
• Is the Device Labeled for Single Use? (Y/N): Yes
• 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: 59 YR
• Patient Sex: Male