Should healthcare organisations prioritise passwordless access or network segmentation first?

Why the Sequence Depends on Exposure, Not the Control Name

For healthcare organisations, passwordless access and network segmentation solve different problems. Passwordless reduces the chance that a clinician, contractor, or patient-facing account is compromised through phishing or credential replay. Segmentation limits how far an intruder can move if one access path fails. The right first step is the one that lowers the highest-risk workflow’s blast radius fastest.

That usually means starting where users and systems are most exposed: remote clinician access, patient enrolment, call-centre workflows, or other high-frequency entry points. If those paths are currently protected by weak passwords or reusable credentials, passwordless can cut the most common initial-access risk sooner than a network redesign.

When Passwordless Should Come First

Passwordless is the stronger first move when the main weakness is account takeover. In healthcare, that often includes phishing, help-desk social engineering, password spraying, and session theft against staff with access to electronic health records, scheduling systems, or identity platforms. In those cases, eliminating passwords on the critical path reduces the attacker’s easiest route in.

Passwordless also tends to deliver value quickly when the organisation already has a workable identity stack, device posture controls, and recovery processes. Passwordless and Passkeys Guide is the clearest path when the goal is phishing-resistant authentication, because the practical issue is not whether passwords are outdated in theory, but whether they are the main entry point for compromise today.

A second useful anchor is workforce access. Workforce Identity Security Guide reinforces the point that passwordless is most valuable where clinicians, administrators, and support staff authenticate repeatedly across high-value systems and where account recovery is itself a common abuse path.

When Segmentation Should Come First

Segmentation should lead when the bigger problem is lateral movement or shared infrastructure risk. In healthcare, that can mean legacy clinical devices, flat subnetworks, shared application tiers, or environments where a compromise of one endpoint could expose many records, imaging systems, or operational services. In those settings, even a successful login should not automatically open the whole environment.

Segmentation is especially important when the organisation cannot immediately replace all weak authentication surfaces. If some systems must remain on legacy authentication, or if many third parties and vendors still need access, the priority becomes constraining what those accounts can reach. Remote Access Identity Guide supports that sequencing by showing how remote access controls, posture checks, and zero trust access reduce the spread of compromise across connected systems.

Healthcare organisations with highly interdependent environments should also treat segmentation as a resilience control, not just an intrusion control. NIST SP 800-63 Digital Identity Guidelines supports the authentication side of the decision, while NIST SP 800-207 Zero Trust Architecture supports the principle that access should be continuously verified and scope-limited, which is exactly the trade-off this question is asking teams to balance.

Risk and Threat Considerations

Healthcare environments are attractive because a single access path can lead to operational disruption, sensitive patient data exposure, and broad downstream impact. The risk is not abstract: weak authentication tends to fail at the door, while weak segmentation turns one compromised account into a larger incident.

Failure mechanism: Attackers commonly exploit whichever control is weakest first. If passwords remain in use, phishing or credential stuffing can provide entry; if the network is flat, a compromised account can move laterally into systems that should have stayed isolated.

Impact: The result can range from single-account compromise to ransomware spread, data exfiltration, interruption of clinical workflows, and slower containment because responders must investigate both identity abuse and internal propagation at the same time.

Practitioner Guidance

Decision rule: Prioritise passwordless first when exposed user authentication is the dominant risk, and prioritise segmentation first when one compromise would reach too many clinical or administrative systems. If both risks are material, start with the highest-frequency, highest-blast-radius workflow and the systems it can reach.

What to verify: Confirm where the most sensitive remote access, patient-facing, or vendor access actually enters the environment, then test whether those paths can be phished, replayed, or reused across applications. If the answer is yes, authentication hardening is the faster win; if a compromise would still spread widely, segmentation needs to move in parallel.

Practitioner takeaway: Do not ask which control is universally better, because healthcare security breaks at the place where exposure and spread meet. The right sequence is the one that removes the most likely entry point without leaving the environment flat behind it.

Related resources from NHI Mgmt Group

• Should organisations prioritise external exposure or internal credential governance first?
• Should organisations prioritise passwordless or privileged access modernisation first?
• What should organisations prioritise first, segmentation or identity-based access control?
• What should healthcare organisations prioritise first when balancing fast EMR access with patient privacy?