MAUDE Adverse Event Report: ROCHE DIAGNOSTICS COBAS C 303 ANALYTICAL UNIT; CLINICAL CHEMISTRY ANALYZER

Catalog Number	09793194001
Medical Device Problem Codes	Incorrect, Inadequate or Imprecise Result or Readings (1535); High Test Results (2457)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	04/28/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The serial number of the analyzer is (b)(6).The investigation is ongoing.
Event or Problem Description
There was an allegation of questionable tina-quant hemoglobin a1cdx gen.3 assay result for 5 patient samples tested on the cobas c 303 analytical unit.Sample 1: the initial result was 7.6%.The repeat result at another site was 6.6%.Sample 2: the initial result was 5.9%.The repeat result at another site was 5.1% the test was repeated after medical personnel questioned the recovery in several patient samples.The repeat results were deemed correct.

• Brand Name: COBAS C 303 ANALYTICAL UNIT
• Common Device Name: CLINICAL CHEMISTRY ANALYZER
• Manufacturer (Section D): ROCHE DIAGNOSTICS; 9115 hague road; indianapolis IN 46250 0457
• Manufacturer (Section G): HITACHI HIGH TECH CORP.; 882 ichige hitachinaka; ibaraki 312-8 504; JA 312-8504
• Manufacturer Contact: natalie catton ; 9115 hague road; indianapolis, IN 46250-0457
• MDR Report Key: 25257823
• Report Number: 1823260-2026-02038
• Device Sequence Number: 5419823
• Product Code: JJE
• UDI-Device Identifier: 07613336220153
• UDI-Public: 07613336220153
• Combination Product (Y/N): N
• Initial Reporter State: MS
• Initial Reporter Country: US
• PMA/510(K) Number: K220134
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial,Followup
• Report Date (Section B): 06/22/2026

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: Health Professional
• Device Catalogue Number: 09793194001
• Device Lot Number: 93624901
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Follow-Up
• Initial Date Received by Manufacturer: 04/30/2026
• Supplement Date Received by Manufacturer: 05/27/2026
• Initial Report FDA Received Date: 05/22/2026
• Supplement Report FDA Received Date: 06/22/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• 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
• Patient Sequence Number: 1
• Patient Sex: Unknown
• Patient Race: American Indian Or Alaskan Native