; and (B) containing recommendations of the Comptroller General regarding measures to support and increase coordination of the provision of health care services to Indians as described in paragraph (1). (b) Payments for contract health services (1) In general The Comptroller General shall conduct a study on the use of health care furnished by health care providers under the contract health services program funded by the Service and operated by the Service, an Indian tribe, or a tribal organization. (2) Analysis The study conducted under paragraph (1) shall include an analysis of— (A) the amounts reimbursed under the contract health services program described in paragraph (1) for health care furnished by entities, individual providers, and suppliers, including a comparison of reimbursement for that health care through other public programs and in the private sector; (B) barriers to accessing care under such contract health services program, including barriers relating to travel distances, cultural differences, and public and private sector reluctance to furnish care to patients under the program; (C) the adequacy of existing Federal funding for health care under the contract health services program; (D) the administration of the contract health service program, including the distribution of funds to Indian health programs pursuant to the program; and (E) any other items determined appropriate by the Comptroller General. (3) Report Not later than 18 months after the date of enactment of the Indian Healthcare Improvement Act of 2017 , the Comptroller General shall submit to Congress a report on the study conducted under paragraph (1), together with recommendations regarding— (A) the appropriate level of Federal funding that should be established for health care under the contract health services program described in paragraph (1); (B) how to most efficiently use that funding