HIPAA security and privacy regulations apply to:

While attending physicians and nurses are covered, limiting applicability to only clinical professionals excludes non-clinical staff who also routinely handle or encounter PHI.

Health information managers and IT staff are covered, but restricting the rule to ancillary personnel only ignores the full workforce definition under HIPAA.

HIPAA defines a covered entity's workforce broadly to include all employees, volunteers, trainees, and other persons whose conduct is under the direct control of the entity, whether or not they are paid. This means administrative staff, maintenance workers, and IT personnel are equally bound by HIPAA requirements as clinical staff. The rationale is that any workforce member may encounter PHI in the course of their duties.

HIPAA applies based on workforce membership and potential PHI exposure, not solely on whether a staff member has direct patient contact.