Tenn. Code Ann. § 33-6-701: Review of admitted persons to determine eligibility for discharge

The chief officer of a public or private hospital shall, as often as practicable, but not less often than every six (6) months, examine or cause to be examined each person admitted under this title for treatment of mental illness or serious emotional disturbance. If the chief officer determines on the basis of the examination that the person is eligible for discharge under § 33-6-602 , § 33-6-705 or § 33-6-706 , and that the discharge is not subject to judicial review under § 33-6-708 , the chief officer shall order the immediate release of the person and shall notify the person upon whose application the person was admitted and, if the person was involuntarily hospitalized, the court that ordered the hospitalization.