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    Quality & RiskQuality System

    Complaint Handling

    Process for receiving, evaluating, and responding to device complaints.

    Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed September 19, 2026

    Definition

    Per 21 CFR 820.198, manufacturers must maintain procedures for receiving, reviewing, and evaluating complaints, with timely investigation and - when reportable - submission to FDA under 21 CFR Part 803. A complaint is any communication alleging deficiencies in identity, quality, durability, reliability, usability, safety, effectiveness or performance of a device after release. Each one must be evaluated for whether it is a reportable event, investigated unless a documented rationale says otherwise, and trended. Under the QMSR, complaint requirements sit in ISO 13485 clause 8.2.2 plus FDA-specific record content kept in 21 CFR 820.35.
    What the regulation says
    Complaint handling is a critical post-market surveillance activity mandated by various regulatory bodies. For instance, the FDA, under 21 CFR 820.198, requires medical device manufacturers to establish and maintain procedures for receiving, reviewing, and evaluating complaints. Similarly, the EU Medical Device Regulation (EU MDR) Annex I, Section 3, emphasizes the importance of a quality management system that includes post-market surveillance activities, explicitly covering the handling of complaints. Furthermore, ISO 13485:2016, clause 8.2.2, details requirements for complaint handling processes as part of the overall quality management system.

    What this means in practice

    Complaint handling is the entry point for the post-market feedback loop, feeding CAPA, vigilance, and risk management updates.

    Examples

    • A medical device manufacturer receives a report from a hospital indicating that a surgical instrument malfunctioned during a procedure, requiring a procedure to be restarted.
    • A patient contacts a MedTech company via their website to report an unexpected side effect experienced after using a new diagnostic device.
    • An internal quality control team identifies a trend of similar issues across multiple devices during routine complaint review, prompting a broader investigation.
    Common pitfalls
    • •Failure to define clear criteria for what constitutes a complaint can lead to underreporting or misclassification.
    • •Inadequate investigation of complaints can result in recurring issues and potential harm to patients.
    • •Delay in reporting reportable events to regulatory authorities can lead to severe non-compliance penalties.
    • •Treating complaints solely as customer service issues rather than critical quality data can prevent effective corrective actions.
    • •Insufficient documentation of complaint investigations and resolutions can lead to audit findings and regulatory scrutiny.

    Frequently asked questions

    The primary purpose is to systematically receive, evaluate, and investigate feedback about potential issues with a medical device, ensuring product safety and quality.

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    Sources

    3 sources

    Every citation below opens the original document. Each is graded against our source-tier hierarchy so you can see what rests on binding law versus commentary.

    Tier 1Binding law and standards· 1Tier 2Regulator guidance and consensus· 1Tier 4Trade press and expert commentary· 1
    Link health: 3 verified· last checked 2026-06-20
    eCFR·1MDIC·1FDA·1
    1. 1
      21 CFR 820.198
      Tier 1 Verified
      eCFRecfr.gov
    2. 2
      MDIC Case for Quality
      Tier 4 Verified
      MDICmdic.org
    3. 3
      FDA - Quality Systems
      Tier 2 Verified
      FDAfda.gov

    Inline markers like [1] jump to the matching reference above.