How should healthcare organisations govern non-human identities that handle patient data?

Why This Matters for Security Teams

Healthcare organisations are not just protecting usernames and passwords. They are governing machine identities that can query EHR systems, move PHI between platforms, trigger workflows, and interact with vendors. That makes non-human identities part of the clinical data path, not a back-office detail. The practical risk is that service accounts, API keys, and certificates often outlive the systems they support, and the blast radius can be large when they are over-privileged or unowned. NHI Mgmt Group research shows Ultimate Guide to NHIs — Key Research and Survey Results reports that 80% of identity breaches involved compromised non-human identities such as service accounts and API keys.

For healthcare, that matters because privacy, safety, and availability are linked. A token with broad access can pull more patient records than any one clinician would normally see, and automated jobs often bypass the scrutiny given to human access. Current guidance from the NIST Cybersecurity Framework 2.0 still applies: identify assets, protect access, detect misuse, and recover quickly when credentials are exposed. In practice, many security teams encounter PHI exposure only after an integration fails or an audit surfaces a forgotten credential, rather than through intentional governance.

How It Works in Practice

Healthcare organisations should govern NHIs by tying every identity to a business owner, a documented purpose, and a data boundary. Start with inventory: service accounts in EHR connectors, API keys in telehealth apps, certificates used by imaging systems, and automation tokens in CI/CD or workflow tools. Then classify each identity by what patient data it can reach, whether it is interactive or background-only, and whether it can be constrained to a single workload or tenant. The lifecycle approach described in Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs is useful here because healthcare environments need creation, rotation, review, and offboarding to be deliberate, not ad hoc.

Operationally, that means combining RBAC with tighter controls where the risk warrants it. Use PAM for elevated operations, JIT for temporary access, and short-lived secrets wherever systems can support them. Secrets should be stored in managed vaults, rotated on a defined schedule, and revoked when a workload is decommissioned or a vendor contract ends. For PHI access, authorization should be tied to context: which system is calling, what it is trying to do, and whether that action matches its declared purpose. This is where ZTA and least privilege become practical rather than theoretical. The NIST Cybersecurity Framework 2.0 supports the same discipline through identity, access, and continuous monitoring functions.

• Assign each NHI an owner, system of record, and expiry date.
• Separate production PHI access from test, analytics, and support access.
• Rotate credentials automatically and disable dormant identities quickly.
• Monitor for unusual calling patterns, bulk reads, and new destination systems.

These controls tend to break down in legacy hospital integration engines and vendor-managed interfaces because credentials are embedded in code, device firmware, or unsupported middleware.

Common Variations and Edge Cases

Tighter NHI control often increases operational overhead, requiring organisations to balance security gains against uptime, vendor coordination, and clinical workflow constraints. That tradeoff is real in healthcare, where some systems cannot yet support ephemeral credentials or frequent certificate rotation without service disruption. Current guidance suggests prioritising the highest-risk identities first: anything that can read, export, or transform PHI; anything shared across environments; and anything owned by a third party. For lower-risk internal jobs, a phased migration may be more realistic than immediate replacement.

There is also no universal standard for how often every machine credential should rotate, because acceptable TTL depends on system criticality, integration support, and compensating monitoring. A long-lived credential may be unavoidable in a medical device or vendor appliance, but then compensating controls matter more: network segmentation, strict allowlists, alerting on anomalous use, and documented break-glass procedures. The audit perspective in Ultimate Guide to NHIs — Regulatory and Audit Perspectives is especially relevant when regulators or internal auditors ask who can prove that a dormant token cannot still reach PHI. Use the findings in Top 10 NHI Issues to pressure-test where ownership, rotation, and visibility are weakest.

One practical exception is emergency access for patient care. Break-glass credentials may be justified, but they should be tightly scoped, heavily logged, and reviewed after use. Another is third-party support: shared service identities should be avoided where possible, but if a supplier insists on them, require separate accounts per integration and contractually define logging and rotation obligations.

Related resources from NHI Mgmt Group

• How should organisations govern non-human identities across their environment?
• How can organisations govern non-human identities more effectively?
• How should security teams govern non-human identities at scale?
• How should security teams govern non-human identities for compliance?