; and (2) are provided to individuals for the purpose of evaluating immunologic response to certain antigens. . (b) Effective date (1) In general Subject to paragraph (2), the amendments made by this section shall apply with respect to items and services provided on or after January 1, 2019. (2) Exception for State legislation In the case of a State plan under title XIX of the Social Security Act ( 42 U.S.C. 1396 et seq.) that the Secretary of Health and Human Services determines requires State legislation in order for the respective plan to meet any requirement imposed by amendments made by this section, the respective plan shall not be regarded as failing to comply with the requirements of such title solely on the basis of its failure to meet such an additional requirement before the first day of the first calendar quarter beginning after the close of the first regular session of the State legislature that begins after the date of the enactment of this Act. For purposes of the previous sentence, in the case of a State that has a 2-year legislative session, each year of the session shall be considered to be a separate regular session of the State legislature. 4. Medicare coverage for allergy diagnostic testing services (a) Coverage Section 1861 of the Social Security Act ( 42 U.S.C. 1395x ) is amended— (1) in subsection (s)(2)— (A) in subparagraph (FF), by striking and at the end; (B) in subparagraph (GG), by striking the semicolon at the end and inserting ; and ; and (C) by adding at the end the following new subparagraph: (HH) allergy diagnostic testing services (as defined in subsection (jjj)); ; and (2) by adding at the end the following new subsection: (jjj) Allergy diagnostic testing services (1) In general The term allergy diagnostic testing services means in vitro specific IgE tests and percutaneous tests— (A) that have been cleared under section 501(k), classified under section 513(f)(2), or approved under section 515 of the Federal Food, Drug, and Cosmetic Act