QSR to QMSR, FDA's New Incorporated Standard: ISO 13485
by Audrey Skeen
Regulation: 21 CFR part 820
Issuing Authority: Food and Drug Administration (FDA)
Effective Date: 2 February 2026 (FAQ issued 7 August 2024)
FDA Amends 21 CFR Part 820
The FDA has amended 21 CFR part 820 by incorporating ISO 13485:2016, the international standard for quality management systems for medical devices, as detailed in the Federal Register 89 FR 7496, 2024. Announced in January of 2024, this integration comes with a transitional period ending on the final effective date of February 2, 2026. Additionally, this change has necessitated conforming edits to 21 CFR part 4 to clarify requirements for combination products.
Incorporation By Reference: How ISO 13485 Becomes Law
The amendment incorporates ISO 13485:2016 through “incorporation by reference,” authorized by Congress under the Freedom of Information Act (5 U.S.C. 552, 1 CFR part 51). This method of legal incorporation means that the referenced material is treated as though it were published in the Federal Register and CFR, giving it the force and effect of law.
This long-awaited harmonization is designed to reduce regulatory burdens and ensure that manufacturers can comply with both U.S. and international requirements through a unified Quality Management System (QMS).
At a glance —
- FDA Adopts ISO 13485: The FDA is transitioning from QSR to QMSR, aligning 21 CFR part 820 with ISO 13485:2016 by February 2, 2026.
- Key U.S. Requirements Retained: Device labeling, complaint handling, and UDI remain specific to U.S. regulations, even with ISO harmonization.
- Focus on Risk Management: Enhanced emphasis on quantitative data, competency, and risk management within the new QMSR framework.
- Two-Year Transition Period: Manufacturers have until February 2026 to update their Quality Management Systems to meet the new FDA requirements.
Accessing ISO Standards
While 21 CFR part 820 has, in effect, been entirely rewritten, the intent and effect of the regulation remains intact. To access ISO 13485 and ISO 9000:
- ISO 9000 terminology can be viewed at no cost here.
- ISO 13485 and 9000 can be viewed in a read-only format at the ANSI Incorporated by Reference portal here.
- Standards can also be purchased from the International Standard Organization here.
Changes You’ll Notice Right Away in QMSR
The transition to QMSR brings several substantial changes:
- Nomenclature Adjustments: References to ‘Quality System’ (QS) or ‘Quality System (QS) Regulation’ have been updated to ‘Quality Management System Regulation’ (QMSR) to more accurately reflect the holistic approach of ISO 13485.
- Retention of Unique U.S. Requirements: The new regulation retains key requirements unique to the U.S., such as device labeling, complaint records, service records, confidentiality, and Unique Device Identification.
- Emphasis on Quantitative Data and Competency: There is an enhanced focus on using quantitative data to drive decisions and an increased emphasis on competency, extending beyond mere training.
- Maintenance of MDSAP: The Medical Device Single Audit Program (MDSAP) will continue to be maintained and updated under the new regulations.
Clarification of Conflicting Clauses
In the FD&C Act, the definitions for ‘device’ and ‘labeling’ are found in sections 201(h) and (m), respectively. These definitions take precedence over the similar terms ‘medical device’ and ‘labelling’ used in ISO 13485:2016. Additionally, ‘safety and performance,’ as defined in Clause 0.1 of ISO 13485, is interpreted to align with ‘safety and effectiveness’ as specified in section 520(f) of the FD&C Act.
Adoption of New ISO 13485 Vocabulary and Practices
The definitions for DHF, DMR, and DHR have been removed as they duplicate the requirements specified in Clause 7 and the ‘Medical Device File’ (MDF) outlined in Clause 4.2.3 of ISO 13485. Although the specific terminology has been updated, the requirements for maintaining design and development files remain unchanged.
The requirement for an independent reviewer in design reviews has been removed. However, design reviews must still include appropriate personnel. While not mandatory, the involvement of an independent reviewer can provide critical insight and help balance the review process.
There is now an increased emphasis on Risk Management within the regulatory framework.
Separate Activities for FDA Inspections and ISO Audits
The FDA does not intend to require ISO 13485 certification for compliance. FDA inspections will not result in the issuance of ISO 13485 certificates of conformity. Additionally, ISO certification is not a substitute for FDA oversight.
The FDA remains committed to enforcing the Food, Drug, and Cosmetic Act (FD&C Act) requirements, not only those outlined in the Quality Management System Regulation (QMSR) but also other critical regulations such as labeling (801), medical device reporting (803), reports of corrections and removals (806), medical device tracking requirements (821), and unique device identification (830). These areas fall outside the scope of ISO 13485, underscoring the FDA’s broader regulatory mandate.
Transition Period and Compliance
Manufacturers have a two-year transition period, beginning with the announcement in January 2024, to update their quality management systems (QMS) in line with the new requirements. During this time, the FDA will also revise its inspection process (Quality System Inspection Technique QSIT) to reflect the new QMSR standards, including updates to the PMA QS Module guidance (FDA-2020-D-0957). As new materials, policies, and procedures become available, FDA staff will be trained to ensure they are well-prepared to implement the updated inspection process.
Until the transition is complete, manufacturers must continue to comply with the current 21 CFR part 820 regulations, and any inspections conducted before the transition date will follow the existing requirements.
Considerations based on ISO Certification
The harmonization of ISO 13485:2016 with U.S. FDA regulations impacts all entities under FDA oversight. However, the specific effects vary depending on the status and scope of ISO 13485 certification. Assuming FDA compliance requirements apply to all entities, here are considerations we recommend:
- ISO 13485 Certification with Full Scope
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- Recommendation: Update the nomenclature and references in your Quality Manuals, Standard Operating Procedures (SOPs), and other documentation to ensure alignment with the latest terminology.
- Implementation: While the core processes and operations should remain largely unchanged, focus on updating nomenclature and correcting references to stay compliant.
- ISO 13485 Design-Only Certification
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- Recommendation: Revise your Quality Manuals, SOPs, and related documents to reflect the updated terminology required under the new standards.
- Implementation: Operational processes will likely remain consistent, with necessary updates focused primarily on aligning terminology and references.
- No ISO 13485 Certification
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- Recommendation: Conduct a comprehensive gap analysis to identify necessary updates for aligning with ISO 13485:2016, as its requirements closely mirror the FDA’s QS regulation.
- Implementation: Update all relevant documentation, including Quality Manuals and SOPs, to reflect current terminology, and ensure that Design Control processes are robust and fully compliant with the new standards.
Key Next Steps
To ensure a smooth transition to the new QMSR standards and compliance by the deadline on February 2, 2026, manufacturers should take the following steps:
- Perform a Gap Analysis: Conduct a thorough analysis of your current processes and systems to identify any updates required to align with ISO 13485:2016. This will help you determine what changes, if any, are necessary before the final deadline.
- Plan Meetings and Training: Organize internal meetings or training sessions to educate staff on the upcoming regulatory changes and ensure everyone is prepared to implement necessary updates.
- Designate a Transition Team: Ensure you have a designated person or team responsible for managing the compliance process.
Guidance and Hands-On Help – Let’s Tackle It Together
Understanding and adapting to regulatory changes can be complex. If you’re seeking expert guidance and hands-on help through the transition to the new QMSR, MDC Associates is here to assist. Our team of regulatory specialists is ready to support you in updating your quality management systems to meet the new FDA and ISO standards. Reach out to us at to schedule a consultation.
Partnering with MDC Associates means more than just compliance. Our team not only provides strategic guidance but also offers hands-on support to execute critical tasks, helping you minimize risk, optimize resources, and navigate regulatory complexities with confidence—positioning your organization for long-term success and a competitive edge in a demanding industry.
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