--- title: "Molecular Diagnostics, Definition | MedTech Terms" description: "IVDs that detect nucleic acids - DNA or RNA - to diagnose disease. Plain-English Market Segments definition for MedTech teams, with examples and related terms." lang: en json-ld: | { "@context": "https://schema.org", "@graph": [ { "@type": "DefinedTerm", "@id": "https://medtechterms.com/terms/molecular-diagnostics#term", "name": "Molecular Diagnostics", "description": "Molecular diagnostics use PCR, isothermal amplification, sequencing (NGS), or hybridization to detect pathogens (HPV, HIV, respiratory panels), genetic variants (BRCA, KRAS), and oncology biomarkers (MRD, ctDNA).", "url": "https://medtechterms.com/terms/molecular-diagnostics", "termCode": "molecular-diagnostics", "inDefinedTermSet": { "@type": "DefinedTermSet", "name": "MedTech Terms", "url": "https://medtechterms.com/terms" } }, { "@type": "Article", "@id": "https://medtechterms.com/terms/molecular-diagnostics#article", "headline": "Molecular Diagnostics", "description": "IVDs that detect nucleic acids - DNA or RNA - to diagnose disease.", "url": "https://medtechterms.com/terms/molecular-diagnostics", "mainEntityOfPage": { "@type": "WebPage", "@id": "https://medtechterms.com/terms/molecular-diagnostics" }, "about": { "@id": "https://medtechterms.com/terms/molecular-diagnostics#term" }, "articleSection": "Market Segments", "inLanguage": "en", "keywords": "Molecular Diagnostics, Market Segments, medical device, MedTech", "author": { "@type": "Person", "name": "Christian Espinosa", "jobTitle": "Founder, Blue Goat Cyber", "url": "https://bluegoatcyber.com" }, "publisher": { "@type": "Organization", "name": "MedTech Terms", "url": "https://medtechterms.com" }, "isPartOf": { "@type": "WebSite", "name": "MedTech Terms", "url": "https://medtechterms.com" }, "datePublished": "2026-05-05", "dateModified": "2026-05-05", "citation": [ { "@type": "CreativeWork", "name": "AMP", "url": "https://www.amp.org/", "publisher": { "@type": "Organization", "name": "AMP" } }, { "@type": "CreativeWork", "name": "MedTech Europe - Facts & Figures", "url": "https://www.medtecheurope.org/datahub/", "publisher": { "@type": "Organization", "name": "MedTech Europe" } }, { "@type": "CreativeWork", "name": "MedTech Dive", "url": "https://www.medtechdive.com/", "publisher": { "@type": "Organization", "name": "MedTech Dive" } } ], "mentions": [ { "@type": "DefinedTerm", "@id": "https://medtechterms.com/terms/ivd#term", "name": "In Vitro Diagnostics", "alternateName": "IVD", "url": "https://medtechterms.com/terms/ivd" }, { "@type": "DefinedTerm", "@id": "https://medtechterms.com/terms/companion-diagnostic#term", "name": "Companion Diagnostic", "alternateName": "CDx", "url": "https://medtechterms.com/terms/companion-diagnostic" } ] }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://medtechterms.com/" }, { "@type": "ListItem", "position": 2, "name": "Terms", "item": "https://medtechterms.com/terms" }, { "@type": "ListItem", "position": 3, "name": "Market Segments", "item": "https://medtechterms.com/terms?cat=Market%20Segments" }, { "@type": "ListItem", "position": 4, "name": "Molecular Diagnostics", "item": "https://medtechterms.com/terms/molecular-diagnostics" } ] }, { "@type": "FAQPage", "@id": "https://medtechterms.com/terms/molecular-diagnostics#faq", "mainEntity": [ { "@type": "Question", "name": "What is the primary regulatory challenge for novel molecular diagnostic tests?", "acceptedAnswer": { "@type": "Answer", "text": "The primary challenge often involves demonstrating clear analytical and clinical validity, especially for companion diagnostics or tests with complex bioinformatics components. 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This involves securing data transmission, storage, and access, as well as protecting against ransomware and other cyber threats, as outlined in FDA guidance on cybersecurity in Medical Devices." } } ] } ] } --- [ MedTech Terms The authoritative reference ](/) Browse Learn [Latest](/latest) About 1. [Home](/) 2. / 3. [Terms](/terms) 4. / 5. [Market Segments](/terms?cat=Market%20Segments) 6. / 7. Molecular Diagnostics [All terms](/terms) Market Segments [Strategic Landscape](/ecosystems/strategic-landscape) # Molecular Diagnostics IVDs that detect nucleic acids - DNA or RNA - to diagnose disease. Reviewed by [Christian Espinosa, Founder, Blue Goat Cyber](/authors/christian-espinosa) Last reviewed May 5, 2026 ## Definition Molecular diagnostics use PCR, isothermal amplification, sequencing (NGS), or hybridization to detect pathogens (HPV, HIV, respiratory panels), genetic variants (BRCA, KRAS), and oncology biomarkers (MRD, ctDNA). What the regulation says Molecular diagnostics, as a type of in vitro diagnostic ( [IVD](/terms/ivd)) device, are subject to regulations such as the FDA's 21 CFR 809 and the [EU In Vitro Diagnostic Regulation](/terms/ivdr) (IVDR) 2017/746. These regulations ensure the safety and effectiveness of molecular diagnostic tests, covering aspects from design and development to [post-market surveillance](/terms/post-market-surveillance). Specific guidance documents, like those from the FDA, detail requirements for analytical and clinical validity, as well as [labeling](/terms/labeling). ## What this means in practice COVID accelerated decentralized PCR. Oncology MRD (Natera Signatera, Guardant Reveal) is reshaping post-treatment monitoring. Reimbursement via MolDx and [PAMA](/terms/pama) price cuts shape unit economics. ## Examples - A PCR-based COVID-19 diagnostic test submitted for FDA Emergency Use Authorization (EUA) must demonstrate high sensitivity and specificity in detecting SARS-CoV-2 RNA. - A next-generation sequencing (NGS) panel used to identify oncology biomarkers for targeted therapy selection requires CE marking under the EU IVDR, necessitating a Notified Body assessment. - A molecular diagnostic system processing patient samples and transmitting results to an Electronic Health Record (EHR) must comply with HIPAA regulations for protected health information and implement cybersecurity controls per NIST CSF. Common pitfalls - • Misinterpreting genetic variants or pathogen strains can lead to inappropriate patient management or public health interventions. - • Failure to validate software algorithms used in molecular diagnostics can result in erroneous test results and patient harm. - • Lack of robust cybersecurity controls in connected molecular diagnostic devices can expose patient data or compromise test integrity. - • Using non-cGMP compliant reagents or instruments can invalidate test results and lead to regulatory non-compliance. - • Inadequate consideration of the total product lifecycle, including post-market surveillance, can lead to delayed identification of performance issues or adverse events. ## Frequently asked questions What is the primary regulatory challenge for novel molecular diagnostic tests? The primary challenge often involves demonstrating clear analytical and clinical validity, especially for companion diagnostics or tests with complex bioinformatics components. Regulators require robust evidence to support the [intended use](/terms/intended-use) and performance claims. How does software as a Medical Device (SaMD) relate to molecular diagnostics? What cybersecurity considerations are particularly relevant for molecular diagnostics? ## Related terms Grouped by theme ### Editor's picks · Hand-selected related concepts [ Market Segments Companion Diagnostic(CDx) IVD that identifies patients who will benefit from a specific drug. ](/terms/companion-diagnostic)[ Market Segments In Vitro Diagnostics(IVD) Tests performed on biological samples outside the body. ](/terms/ivd) ### More in Market Segments · Same category [ Market Segments Aesthetic & Energy-Based Devices Lasers, RF, ultrasound, cryolipolysis, and IPL systems used for medical and cosmetic indications, body contouring, hair removal, skin tightening, vascular lesions. ](/terms/aesthetics-energy-devices)[ Market Segments AI Imaging Software Software that analyzes medical images to triage, detect, or quantify disease. ](/terms/ai-imaging)[ Market Segments Cardiac Rhythm Management(CRM) Implantable and external devices that monitor and treat cardiac arrhythmias, pacemakers, ICDs, CRT devices, and insertable cardiac monitors. ](/terms/cardiac-rhythm-management)[ Market Segments Cardiovascular Devices Devices for diagnosing, monitoring, or treating cardiovascular disease. ](/terms/cardiovascular) Cited by Where this term appears across MedTech Terms. Ecosystems (1) - [Strategic Landscape](/ecosystems/strategic-landscape) ## Primary references 3 sources Link health: 3 verified · last checked 2026-06-20 AMP· 1 MedTech Europe· 1 MedTech Dive· 1 1. [1 AMP Verified AMP · amp.org ](https://www.amp.org/) 2. [2 MedTech Europe - Facts & Figures Verified MedTech Europe · medtecheurope.org ](https://www.medtecheurope.org/datahub/) 3. [3 MedTech Dive Verified MedTech Dive · medtechdive.com ](https://www.medtechdive.com/) Inline markers like \[1\] jump to the matching reference above. Sponsor note ### Building a connected device in this segment? Blue Goat Cyber specializes in MedTech cybersecurity across imaging, cardiac, IVD, surgical, and other connected segments. [Book a 30-minute discovery session](https://go.bluegoatcyber.com/meetings/blue-goat-cyber/discovery-session) - No obligation - Expert-led from minute one - NDA available on request MedTech Terms is a community resource sponsored by [Blue Goat Cyber](https://bluegoatcyber.com). Definitions are independent of any vendor. On this term Category Market Segments Sources 3 Updated 5/5/2026 [Compare with another term](/compare?a=molecular-diagnostics) Learn in 60 seconds Card Lesson Quiz IVDs that detect nucleic acids - DNA or RNA - to diagnose disease. - · COVID accelerated decentralized PCR. - · Oncology MRD (Natera Signatera, Guardant Reveal) is reshaping post-treatment monitoring. - · Reimbursement via MolDx and PAMA price cuts shape unit economics. Remember this Watch out: Misinterpreting genetic variants or pathogen strains can lead to inappropriate patient management or public health interventions. Related terms - [In Vitro Diagnostics(IVD) ](/terms/ivd) - [Companion Diagnostic(CDx) ](/terms/companion-diagnostic) You may also need Auto-suggested from Market Segments and shared keywords. - [In Vitro Diagnostics (Segment)(IVD) ](/terms/ivd-segment) - [AI Imaging Software ](/terms/ai-imaging) - [Point-of-Care Diagnostics(POC) ](/terms/point-of-care) - [Sleep & Respiratory Devices ](/terms/sleep-respiratory-devices) - [Genetic Testing Requirements (IVDR Article 4) ](/terms/ivdr-genetic-testing) - [Cardiovascular Devices ](/terms/cardiovascular) [All Market Segments terms](/terms?cat=Market%20Segments) MedTech Terms An authoritative, plain-language reference for the regulatory, quality, cybersecurity, and software terms that shape modern medical devices. 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