42 CFR § 485.51 - Definition.
As used in this subpart, unless the context indicates otherwise, “comprehensive outpatient rehabilitation facility”, “CORF”, or “facility” means a nonresidential facility that -
(a) Is established and operated exclusively for the purpose of providing diagnostic, therapeutic, and restorative services to outpatients for the rehabilitation of injured, disabled, or sick persons, at a single fixed location, by or under the supervision of a physician except as provided in paragraph (c) of this section;
(b) Meets all the requirements of this subpart.
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