Definition. “Unit of service” means an hour of service rendered by a qualified individual during a home visit to a participant, not including: The time spent on related activities before or after the home visit; or The time spent on supervisory or consultative services to the provider. A provider may bill for the length of a home visit to a participant, upon completion of the services specified in §D of this regulation. Behavior consultation services may be preauthorized by a participant's plan of care as necessary and appropriate when: A participant's behavior is: Disruptive; Potentially dangerous to the participant's or another person's health and functioning; or Placing the participant at risk of institutionalization due to health and safety concerns; and Advice is needed as to how to manage the disruptive behavior of a participant. Behavior consultation services include a: Home visit by an individual qualified to render services to: Evaluate a participant's acute behavior change; Assess the situation; Determine the contributing factors; and Recommend interventions and treatments; Written report prepared for review by the case manager and the assisted living services provider or the participant's family, which assesses the situation and makes recommendations; and Verbal review of the report with the case manager and the assisted living services provider or the participant's family to discuss: The report's findings and recommendations; and A course of action, including any related needed medical interventions.