NIST Special Publication 800-53 "Security and Privacy Controls for Information Systems and Organizations" (Rev. 5, 2020) is the comprehensive federal control catalog used by US government systems. NIST SP 800-171 "Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations" (Rev. 3, 2024) is the subset of 800-53 controls applicable to private organizations that handle Controlled Unclassified Information (CUI). MedTech companies serving the VA, DoD, or BARDA-funded programs are routinely asked to map their security posture to these controls.

Why it matters

MedTech teams that touch federal customers typically maintain a 800-171 SSP (System Security Plan) and POA&M (Plan of Actions & Milestones). The control language overlaps heavily with ISO 27001 and NIST CSF, so a unified evidence base is achievable with planning.

Common pitfalls

•Treating 800-171 as a one-time assessment rather than an ongoing posture.
•Failing to scope CUI accurately - over-scoping balloons cost, under-scoping fails audit.

Sources

NIST SP 800-53 Rev. 5 · NIST
NIST SP 800-171 Rev. 3 · NIST
FDA - Cybersecurity for Medical Devices · FDA

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Why compare MedTech terms side by side?

MedTech terminology is full of pairs that look interchangeable but carry very different regulatory, clinical, and commercial consequences. Picking the wrong framework, pathway, or standard early in a project can add months to a submission, invalidate clinical evidence, or trigger an audit finding. Side-by-side comparison is the fastest way to surface those differences before they become costly mistakes.

Each comparison on this page pulls from the same vendor-neutral, sourced definitions used throughout the MedTech Terms glossary. You see the one-line summary, the formal definition, why it matters in practice, common pitfalls, and the primary sources (FDA guidance, EU MDR/IVDR articles, ISO/IEC standards, MDCG documents, IMDRF principles) that back each entry. That makes the comparison defensible in regulatory strategy memos, design reviews, and submission narratives.

Common comparison patterns

Regulatory pathway choice - 510(k) vs PMA, 510(k) vs De Novo, Abbreviated vs Special 510(k).
Quality systems - QSR vs ISO 13485, QMSR vs QSR.
Software classification - SaMD vs SiMD, Locked vs adaptive AI.
EU frameworks - MDR vs IVDR, CE Mark vs UKCA.
Cybersecurity artifacts - SPDX vs CycloneDX SBOM, CVE vs CVSS.
Post-market actions - Recall vs field action, Removal vs correction.

How to use this tool

Pick term A and term B from the dropdowns, or click a preset above. The URL updates with both slugs so you can bookmark or share the exact comparison with a colleague, a notified body reviewer, or your regulatory consultant. Click Open full page on either side for the complete entry, including FAQs, related terms, and the full citation list. If you are not sure which term to start with, browse the Categories view or the A-Z index.

MedTech Terms is a vendor-neutral community resource sponsored by Blue Goat Cyber. Definitions are written for educational use and are not legal or regulatory advice.