Which controls help enforce minimum necessary data access in a health information system?

• A. Access controls, role-based permissions, data segmentation, and audit trails.
• B. Global unrestricted access for all staff.
• C. Only password complexity; no access controls.
• D. Disabling logging to protect privacy.

Answer: (A)

Enforcing minimum necessary data access hinges on the principle of least privilege: grant each user only the access they need to do their job. The option that lists access controls, role-based permissions, data segmentation, and audit trails embodies this approach.

Access controls regulate who can log in and what actions they can take. Role-based permissions tie each user's rights to their job function, so a clinician can reach clinical data, but not unrelated administrative information. Data segmentation further narrows exposure by dividing data into portions or groups so users can access only the data necessary for their duties. Audit trails provide a recorded history of who accessed what data and when, creating accountability and aiding in detecting and responding to misuse.

This combination is essential in health information systems because it protects protected health information and supports regulatory compliance by limiting exposure, enforcing policies, and enabling traceability. The other options undermine this goal: global unrestricted access defeats the minimum-access principle; relying only on password complexity ignores who has access or what they can do; turning off logging removes the ability to detect violations and hold individuals accountable.