1. Short title This Act may be cited as the CT Colonography Screening for Colorectal Cancer Act of 2018 . 2. Coverage of computed tomography colonography screening as a colorectal cancer screening test under Medicare (a) In general Section 1861(pp)(1) of the Social Security Act ( 42 U.S.C. 1395x(pp)(1) ) is amended— (1) by redesignating subparagraph (D) as subparagraph (E); and (2) by inserting after subparagraph (C) the following new subparagraph: (D) Screening computed tomography colonography. . (b) Frequency limits and payment Section 1834(d) of such Act ( 42 U.S.C. 1395m(d) ) is amended by adding at the end the following new paragraph: (4) Screening computed tomography colonography (A) Fee schedule With respect to a colorectal cancer screening test consisting of screening computed tomography colonography, subject to subparagraph (B), payment under section 1848 shall be consistent with payment under such section for similar or related services. (B) Payment limit In the case of screening computed tomography colonography, payment under this part shall not exceed such amount as the Secretary specifies, based upon rates recognized for diagnostic computed tomography colonography. (C) Facility payment limit Notwithstanding any other provision of this title, in the case of an individual who receives screening computed tomography colonography— (i) in computing the amount of any applicable coinsurance, the computation of such coinsurance shall be based upon the fee schedule under which payment is made for the services; and (ii) the amount of such coinsurance shall not exceed 25 percent of the payment amount under the fee schedule described in subparagraph (A). (D) Frequency limit No payment may be made under this part for a colorectal cancer screening test consisting of a screening computed tomography colonography— (i) if the individual is under 50 years of age