ISO 27001 vs HIPAA
ISO 27001 vs HIPAA for health-tech SaaS: compare ISMS certification, US PHI obligations, security controls, evidence, and implementation order.
Key differences
| Dimension | ISO/IEC 27001 | HIPAA |
|---|---|---|
| Source and authority | ISO/IEC 27001:2022 is an international voluntary management-system certification standard. | HIPAA is US federal law implemented through Privacy, Security, and Breach Notification Rules and enforced by HHS OCR. |
| Applicability | Any organization may certify a defined ISMS scope, regardless of industry or data type. | Applies to covered entities and business associates handling PHI; contracts and data flows determine role and duties. |
| Assurance output | An accredited certification body issues a certificate after Stage 1 and Stage 2 audits, followed by surveillance. | There is no HHS HIPAA certification; compliance is shown through policies, risk analysis, safeguards, BAAs, and conduct. |
| Risk method | Clauses 6.1.2–6.1.3 require repeatable information-security risk assessment and treatment plus an SoA. | 45 CFR §164.308(a)(1)(ii)(A) requires an accurate and thorough ePHI risk analysis and risk management process. |
| Control design | Annex A controls are selected based on risk and justified in the Statement of Applicability. | Security Rule standards include required and addressable implementation specifications; addressable does not mean optional. |
| Data and rights | The ISMS protects information in scope for confidentiality, integrity, and availability. | HIPAA focuses on PHI/ePHI and also imposes Privacy Rule use, disclosure, minimum-necessary, and individual-access duties. |
| Incident reporting | A.5.24–A.5.28 establish security-event planning, response, learning, and evidence handling. | The Breach Notification Rule requires risk assessment and notices on statutory schedules, including 60-day outer deadlines. |
Control overlap
A health-tech SaaS company can use one security program for ISO 27001 and much of the HIPAA Security Rule. ISO risk controls map naturally to /controls/hipaa/164-308-a-1; access management A.5.15–A.5.18 supports §164.308(a)(3)–(4) and /controls/hipaa/164-312-a-2-iv; logging A.8.15 supports /controls/hipaa/164-312-b; and transmission security A.8.24 supports /controls/hipaa/164-312-e-1. Supplier controls A.5.19–A.5.23 reinforce business-associate diligence. ISO certification does not supply BAAs, Privacy Rule policies, required/addressable decisions, breach-notification analysis, or proof that every ePHI system is inside the certified scope.
Sequencing advice
A health-tech SaaS vendor should first confirm whether it is a business associate, inventory every ePHI flow, execute BAAs, and complete the HIPAA risk analysis because those duties attach to operations rather than an audit date. Build shared controls for identity, audit logging, encryption, backups, incidents, workforce access, and vendors, recording HIPAA required/addressable decisions as they are made. Then set the ISO ISMS boundary to include the same production environment and supporting teams, create the SoA, and run internal audit and management review. Certification can follow without duplicating evidence, but never market it as “HIPAA certified” or allow excluded systems to disappear from the HIPAA inventory.