Wash. Admin. Code § 182-500-0080
"Ordering and referring provider" means any physician or other health care professional who orders or refers items or services for clients eligible for Washington's health care programs administered by the agency.
"Outpatient" means a patient receiving care in a hospital outpatient setting or a hospital emergency department, or away from a hospital such as in a physician's office or clinic, the patient's own home, or a nursing facility.
"Overhead costs" means those costs that have been incurred for common or joint objectives and cannot be readily identified with a particular final cost objective. Overhead costs that are allocated must be clearly distinguished from other functions and identified as a benefit to a direct service.
Wash. Admin. Code § 182-500-0080