1. Short title This Act may be cited as the Ending the Diagnostic Odyssey Act of 2019 . 2. State option to provide whole genome sequencing clinical services for certain children Title XIX of the Social Security Act ( 42 U.S.C. 1396 et seq.) is amended by inserting after section 1946 the following new section: 1947. State option to provide whole genome sequencing clinical services for certain children (a) In general Notwithstanding section 1902(a)(1) (relating to statewideness), section 1902(a)(10)(B) (relating to comparability), and any other provision of this title which the Secretary determines is necessary to waive in order to implement this section, beginning January 1, 2020, a State, at its option as a State plan amendment, may provide for medical assistance under this title to an eligible individual for purposes of providing the individual with whole genome sequencing clinical services. (b) Payments (1) In general A State shall provide a health care provider (as defined by the State) with payments for the provision of whole genome sequencing clinical services to any eligible individual. Payments made to a health care provider for such services shall be treated as medical assistance for purposes of section 1903(a), except that, during the first 12 fiscal year quarters that the State plan amendment is in effect, the Federal medical assistance percentage applicable to such payments shall be equal to 75 percent. (2) Methodology The State shall specify in the State plan amendment the methodology the State will use for determining payment for the provision of whole genome sequencing clinical services. Such methodology for determining payment shall be established consistent with section 1902(a)(30)(A). (3) Planning grants (A) In general Beginning January 1, 2020, the Secretary may award planning grants to States for purposes of developing a State plan amendment under this section. A planning grant awarded to a State under this paragraph shall remain available until expended. (B) State contribution A State awarded