; (v) the degree to which mail order, specialty, or retail pharmacies that dispense prescription drugs to an enrollee in a plan or coverage that are under common ownership (in whole or part) with plans, issuers, or entities providing pharmacy benefits management services or pharmacy benefits administrative services on behalf of such plan or coverage receive reimbursement that is greater than the median price charged to the plan or issuer when the same drug is dispensed to enrollees in the plan or coverage by other pharmacies included in the pharmacy network of that plan, issuer, or entity that are not wholly or partially owned by the plan or issuer, or entity providing pharmacy benefits management services on behalf of such plan or issuer. (B) Requirement The Comptroller General of the United States shall ensure that the report under subparagraph (A) does not contain information that would identify a specific group health plan or health insurance issuer (or an entity providing pharmacy benefits management services on behalf of such plan or issuer), or otherwise contain commercial or financial information that is privileged or confidential. (C) Definitions In this paragraph, the terms group health plan , health insurance coverage , and health insurance issuer have the meanings given such terms in section 2791 of the Public Health Service Act ( 42 U.S.C. 300gg–91 ). (2) Report on copay assistance programs Not later than 18 months after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a report on what is known about the role of copay assistance programs and the impact of such programs on commercial health insurance, stop loss, and drug prices. Such report shall include to the extent feasible— (A) a description of copay assistance programs, including— (i) the types of programs available and the methods of providing copay assistance through such programs, including cash discounts, copay cards, or drugs provided to an individual at no cost