1. Short title This Act may be cited as the Comprehensive Operations, Sustainability, and Transport Act of 2017 . 2. Ground ambulance services cost reporting requirement (a) In general Section 1121 of the Social Security Act ( 42 U.S.C. 1320a ) is amended— (1) in subsection (a)— (A) by striking For the purposes of and inserting Subject to subsection (d), for the purposes of ; (B) by inserting suppliers of ground ambulance services, after health maintenance organizations, ; and (C) in the matter at the end, by adding the following new sentence: Not later than December 31, 2019, the Secretary shall modify the uniform reporting system for providers of services with respect to ambulance services to ensure that such system contains information similar (as determined by the Secretary) to information required under the uniform reporting system for suppliers of ground ambulance services. ; and (2) by adding at the end the following new subsection: (d) In the case of a supplier of ground ambulance services that furnishes such services for fewer than 20 individuals entitled to benefits under part A of title XVIII and enrolled under part B of such title in a cost reporting period (as defined by the Secretary), the Secretary may modify the requirements for inclusion of any information specified in subsection (a) in reports made in accordance with the uniform reporting system established under this section with respect to such services. . (b) Suspension of payment for ground ambulance services