128 Subscriber An employee of the Employer who is eligible for and has enrolled in the Plan. Surprise Billing Claim Please refer to the “Consolidated Appropriations Act of 2021 Notice” at the front of this Booklet for details. Urgent Care Center A licensed health care Facility that is separate from a Hospital and whose main purpose is giving immediate, short-term medical care, without an appointment, for urgent care. Utilization Review Evaluation of the necessity, quality, effectiveness, or efficiency of medical or behavioral health services, Prescription Drugs (as set forth in the section Prescription Drugs Administered by a Medical Provider), procedures, and/or facilities.