Northern Health has confirmed a privacy breach impacting about 160 residents in the Burns Lake area.
The health authority says it is in the process of notifying the affected individuals that their health information was inappropriately accessed by an employee.
Eryn Collins with Northern Health communications says the investigation began after a complaint was received about potential inappropriate access.
Collins says the worker involved is no longer employed by the health authority.
Northern Health says there are policies and procedures in place to review breaches like this.
The health authority has also notified the Office of the Information and Privacy Commissioner.