partial hospitalization services

The term "partial hospitalization services" means the items and services described in paragraph (2) prescribed by a physician for an individual determined (not less frequently than monthly) by a physician to have a need for such services for a minimum of 20 hours per week and provided under a program described in paragraph (3) under the supervision of a physician pursuant to an individualized, written plan of treatment established and periodically reviewed by a physician (in consultation with appropriate staff participating in such program), which plan sets forth the physician's diagnosis, the type, amount, frequency, and duration of the items and services provided under the plan, and the goals for treatment under the plan.