--- title: "TAM / SAM / SOM, Definition | MedTech Terms" description: "Market sizing framework: total, serviceable available, and serviceable obtainable. Plain-English Commercialization definition for MedTech teams, with examples a" lang: en json-ld: | { "@context": "https://schema.org", "@graph": [ { "@type": "DefinedTerm", "@id": "https://medtechterms.com/terms/tam-sam-som#term", "name": "TAM / SAM / SOM", "description": "TAM (Total Addressable Market) is the total revenue opportunity if 100% of the market used the product. SAM (Serviceable Available Market) narrows to the segment the company can serve given regulatory, geographic, and product constraints. 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[Home](/) 2. / 3. [Terms](/terms) 4. / 5. [Commercialization](/terms?cat=Commercialization) 6. / 7. TAM / SAM / SOM [All terms](/terms) Commercialization [Hospital Buyer & Reimbursement](/ecosystems/hospital-buyer) # TAM / SAM / SOM Market sizing framework: total, serviceable available, and serviceable obtainable. Reviewed by [Christian Espinosa, Founder, Blue Goat Cyber](/authors/christian-espinosa) Last reviewed May 5, 2026 ## Definition TAM (Total Addressable Market) is the total revenue opportunity if 100% of the market used the product. SAM (Serviceable Available Market) narrows to the segment the company can serve given regulatory, geographic, and product constraints. SOM (Serviceable Obtainable Market) is the realistic share over a defined timeframe. ## What this means in practice Investors expect bottom-up TAM/SAM/SOM models. In MedTech, sizing must reflect procedure volumes, addressable indications, reimbursement constraints, and competitive dynamics. Common pitfalls - • Top-down sizing ('1% of a $10B market') without unit economics is a red flag in any pitch. ## Related terms Grouped by theme ### Editor's picks · Hand-selected related concepts [ Commercialization Bottom-Up Market Sizing Building market size from procedure volumes × price × penetration. ](/terms/bottom-up-sizing) ### Founder & Investor Primer · From this learning path [ Regulatory 510(k) Premarket Notification(510(k)) FDA submission demonstrating a device is substantially equivalent to a legally marketed predicate. Adjacent lesson ](/terms/510k?from=founder-and-investor-primer)[ Commercialization Freedom to Operate(FTO) Analysis of whether a product can be sold without infringing third-party IP. ](/terms/freedom-to-operate?from=founder-and-investor-primer)[ Regulatory Breakthrough Device Designation(BDD) FDA program providing expedited review for devices that treat life-threatening or irreversibly debilitating conditions. ](/terms/breakthrough-device?from=founder-and-investor-primer)[ Investment & Finance Capitalization Table(Cap Table) Ledger of all securities issued by a company and who owns them. ](/terms/cap-table?from=founder-and-investor-primer) ### More in Commercialization · Same category [ Commercialization AdvaMed Code of Ethics Industry code governing interactions between U.S. medical-device companies and healthcare professionals. ](/terms/advamed-code)[ Commercialization Advisory Board Convening of external experts to advise on strategy or product. ](/terms/advisory-board)[ Commercialization Anti-Kickback Statute(AKS) U.S. criminal statute prohibiting remuneration to induce federal healthcare business. ](/terms/anti-kickback) Cited by Where this term appears across MedTech Terms. Learning paths (1) - [Founder & Investor Primer](/paths/founder-and-investor-primer)Lesson 1 of 16 Ecosystems (1) - [Hospital Buyer & Reimbursement](/ecosystems/hospital-buyer) ## Primary references 3 sources Link health: 3 verified · last checked 2026-06-20 a16z· 1 AdvaMed· 1 AHRMM· 1 1. [1 a16z: market sizing Verified a16z · a16z.com ](https://a16z.com/) 2. [2 AdvaMed Code of Ethics Verified AdvaMed · advamed.org ](https://www.advamed.org/our-work/code-of-ethics/) 3. [3 AHRMM - Healthcare Supply Chain Verified AHRMM · ahrmm.org ](https://www.ahrmm.org/) Inline markers like \[1\] jump to the matching reference above. Sponsor note ### Selling a connected device into health systems? Hospital procurement increasingly requires MDS2, SBOM, and security questionnaires - we help your team answer them confidently. [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 Commercialization Sources 3 Updated 5/5/2026 [Compare with another term](/compare?a=tam-sam-som) Learn in 60 seconds Card Lesson Quiz Market sizing framework: total, serviceable available, and serviceable obtainable. - · Investors expect bottom-up TAM/SAM/SOM models. - · In MedTech, sizing must reflect procedure volumes, addressable indications, reimbursement constraints, and competitive dynamics. - · SAM (Serviceable Available Market) narrows to the segment the company can serve given regulatory, geographic, and product constraints. Remember this Watch out: Top-down sizing ('1% of a $10B market') without unit economics is a red flag in any pitch. Related terms - [Bottom-Up Market Sizing ](/terms/bottom-up-sizing) You may also need Auto-suggested from Commercialization and shared keywords. - [Strategic Acquisition ](/terms/acquisition) - [Advisory Board ](/terms/advisory-board) - [EU In Vitro Diagnostic Regulation(IVDR) ](/terms/ivdr) - [Budget Impact Model(BIM) ](/terms/budget-impact-model) - [Burn Rate ](/terms/burn-rate) - [Earn-Out ](/terms/earn-out) [All Commercialization terms](/terms?cat=Commercialization) MedTech Terms An authoritative, plain-language reference for the regulatory, quality, cybersecurity, and software terms that shape modern medical devices. 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