--- title: "510(k) vs PMA - side-by-side comparison | MedTech Terms" description: "FDA clearance vs FDA approval: the two main US premarket pathways" lang: en json-ld: | { "@context": "https://schema.org", "@graph": [ { "@type": "WebPage", "@id": "https://medtechterms.com/compare/510k-vs-pma", "name": "510(k) vs PMA - MedTech Terms", "description": "FDA clearance vs FDA approval: the two main US premarket pathways", "url": "https://medtechterms.com/compare/510k-vs-pma", "about": [ { "@type": "DefinedTerm", "name": "510(k) Premarket Notification", "url": "https://medtechterms.com/terms/510k" }, { "@type": "DefinedTerm", "name": "Premarket Approval", "url": "https://medtechterms.com/terms/pma" } ], "isPartOf": { "@type": "WebSite", "name": "MedTech Terms", "url": "https://medtechterms.com" } }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://medtechterms.com/" }, { "@type": "ListItem", "position": 2, "name": "Compare", "item": "https://medtechterms.com/compare" }, { "@type": "ListItem", "position": 3, "name": "510(k) vs PMA", "item": "https://medtechterms.com/compare/510k-vs-pma" } ] }, { "@type": "FAQPage", "@id": "https://medtechterms.com/compare/510k-vs-pma#faq", "mainEntity": [ { "@type": "Question", "name": "Can a device switch from PMA to 510(k)?", "acceptedAnswer": { "@type": "Answer", "text": "Rarely. A Class III device may be reclassified to Class II through a reclassification petition or FDA-initiated reclassification, after which a 510(k) becomes possible. This is a multi-year regulatory process and does not apply on demand." } }, { "@type": "Question", "name": "Is De Novo a form of 510(k) or PMA?", "acceptedAnswer": { "@type": "Answer", "text": "Neither. De Novo is a separate pathway for novel low- to moderate-risk devices without a predicate. A granted De Novo creates a new classification and can then serve as a predicate for future 510(k) submissions." } }, { "@type": "Question", "name": "Which pathway carries more post-market risk?", "acceptedAnswer": { "@type": "Answer", "text": "Both carry ongoing obligations. PMA devices have explicit conditions of approval and post-approval studies. 510(k) devices are subject to standard postmarket requirements (QMS, MDR, UDI, cybersecurity per Section 524B if applicable) and, for software-containing products, change control that can trigger a new 510(k)." } }, { "@type": "Question", "name": "Is a 510(k) the same as FDA approval?", "acceptedAnswer": { "@type": "Answer", "text": "No. A 510(k) results in FDA clearance based on substantial equivalence to a predicate device. FDA approval refers to Premarket Approval (PMA), which is used for high-risk Class III devices and requires clinical evidence of safety and effectiveness." } }, { "@type": "Question", "name": "How long does a 510(k) take?", "acceptedAnswer": { "@type": "Answer", "text": "The statutory FDA review clock is 90 days, but total time from submission to clearance commonly runs 3 to 9 months once Refuse to Accept review, Additional Information requests, and interactive review are included." } }, { "@type": "Question", "name": "What is the difference between a Traditional, Special, and Abbreviated 510(k)?", "acceptedAnswer": { "@type": "Answer", "text": "Traditional is the default pathway. Special 510(k) is for modifications to a manufacturer's own cleared device where design controls fully evaluate the change. Abbreviated 510(k) relies on FDA guidance documents, special controls, or recognized consensus standards to streamline review." } }, { "@type": "Question", "name": "How much does a 510(k) cost?", "acceptedAnswer": { "@type": "Answer", "text": "The main direct cost is the FDA user fee, which is updated annually and reduced for small businesses. Preparation costs (testing, consulting, writing) are typically far larger than the user fee itself." } }, { "@type": "Question", "name": "Do I need a 510(k) for software changes?", "acceptedAnswer": { "@type": "Answer", "text": "It depends on whether the change could significantly affect safety or effectiveness. FDA's guidance on 510(k) modifications and the separate software modifications guidance provide decision logic; changes that alter indications, add cybersecurity risk, or introduce new algorithms often require a new 510(k)." } }, { "@type": "Question", "name": "What is the difference between 510(k) and PMA?", "acceptedAnswer": { "@type": "Answer", "text": "510(k) results in clearance based on substantial equivalence to a predicate device and is used for most Class II devices. PMA results in approval based on independent evidence of safety and effectiveness (usually clinical trials) and is required for Class III devices without a suitable predicate." } }, { "@type": "Question", "name": "How long does PMA review take?", "acceptedAnswer": { "@type": "Answer", "text": "The statutory review clock is 180 days, but real total time from submission to approval commonly runs 1 to 3 years including FDA information requests, panel meetings when convened, and facility inspection." } }, { "@type": "Question", "name": "What is a PMA Supplement?", "acceptedAnswer": { "@type": "Answer", "text": "A PMA Supplement is submitted for changes to an approved PMA device (new indication, design change, manufacturing site change, labeling change). FDA offers several supplement types (Panel-Track, 180-Day, Real-Time, 30-Day Notice, Special) matched to the change type and risk." } }, { "@type": "Question", "name": "Are clinical trials always required for PMA?", "acceptedAnswer": { "@type": "Answer", "text": "Almost always. FDA expects independent scientific evidence of safety and effectiveness, which typically requires an IDE-authorized clinical investigation. Exceptions are rare and usually rely on substantial prior clinical experience with a legally marketed foreign predicate." } } ] } ] } --- [ MedTech Terms The authoritative reference ](/) Browse Learn [Latest](/latest) About [All comparisons](/compare) Compare # 510(k) vs PMA FDA clearance vs FDA approval: the two main US premarket pathways 510(k) and PMA are the two dominant FDA premarket pathways. 510(k) reaches the market through substantial equivalence to a predicate device and produces a clearance. PMA reaches the market through independent evidence of safety and effectiveness and produces an approval. Which one applies is driven by device classification, novelty, and available predicates, not by preference. Attribute Regulatory [510(k) Premarket Notification(510(k)) ](/terms/510k) Regulatory [Premarket Approval(PMA) ](/terms/pma) Regulatory outcome Clearance (K number) Approval (P number) Statutory basis Section 510(k) of the FD&C Act; 21 CFR Part 807 Subpart E Section 515 of the FD&C Act; 21 CFR Part 814 Typical device class Most Class II (moderate risk) Class III (high risk, life-supporting or life-sustaining) Evidence standard Substantial equivalence to a legally marketed predicate Independent, reasonable assurance of safety and effectiveness Clinical data Sometimes required; often bench and animal testing is sufficient Almost always required from an IDE-authorized clinical investigation Statutory FDA review clock 90 days 180 days Typical real-world timeline 3 to 9 months from submission to clearance 1 to 3 years from submission to approval Predicate device required Yes: at least one legally marketed predicate with similar indications and technology No predicate needed; PMA stands on its own scientific evidence Manufacturing facility inspection Not routinely triggered by the 510(k) itself Pre-Approval Inspection (PAI) is standard; GMP nonconformities can delay approval Advisory panel involvement Rare Common for novel Class III devices Post-market obligations QMS, MDR, UDI, cybersecurity for cyber devices; changes evaluated per 510(k) modifications guidance Conditions of approval, post-approval studies, annual reports, PMA Supplements for changes Typical FDA user fee Lower (annually updated; small-business discount available) Higher (annually updated; small-business discount available) Change management New 510(k) if change could significantly affect safety or effectiveness PMA Supplement (Panel-Track, 180-Day, Real-Time, 30-Day Notice, or Special) Common misuse Calling 510(k) clearance 'FDA approval' in marketing Assuming a novel high-risk device can find a 510(k) predicate ## When to use which Choose 510(k) Choose 510(k) when a legitimate predicate exists with the same intended use and technological characteristics, and you can support substantial equivalence with bench, animal, and (if needed) limited clinical performance data. [Full 510(k) page](/terms/510k) Choose PMA Choose PMA when the device is Class III, is novel with no acceptable predicate, or FDA has determined that general and special controls are insufficient to assure safety and effectiveness. [Full PMA page](/terms/pma) ## Frequently asked questions Can a device switch from PMA to 510(k)? Rarely. A [Class III device](/terms/class-iii) may be reclassified to Class II through a reclassification petition or FDA-initiated reclassification, after which a 510(k) becomes possible. This is a multi-year regulatory process and does not apply on demand. Is De Novo a form of 510(k) or PMA? Which pathway carries more post-market risk? Is a 510(k) the same as FDA approval? How long does a 510(k) take? What is the difference between a Traditional, Special, and Abbreviated 510(k)? How much does a 510(k) cost? Do I need a 510(k) for software changes? What is the difference between 510(k) and PMA? How long does PMA review take? What is a PMA Supplement? 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