; (B) clinically appropriate in terms of type, frequency, extent, site, and duration; and (C) not primarily for the economic benefit of the health plans and purchasers or for the convenience of the patient, treating physician, or other health care provider. (7) Medicare Administrative Contractor The term medicare administrative contractor means a medicare administrative contractor with a contract under section 1874A of the Social Security Act ( 42 U.S.C. 1395kk–1 ). (8) Medicare Advantage plan The term Medicare Advantage plan means a Medicare Advantage plan under part C of title XVIII of the Social Security Act. (9) Preauthorization The term preauthorization — (A) means the process by which a medicare administrative contractor, Medicare Advantage plan, or prescription drug plan determines the medical necessity or medical appropriateness of health care services for which benefits are otherwise provided under the Medicare program under title XVIII of the Social Security Act or such plan prior to the rendering of such health care services, including preadmission review, pretreatment review, utilization, and case management