; and (iv) by striking or inappropriate or medically unnecessary care and inserting inappropriate or medically unnecessary care, or prescribing or billing practices that indicate abuse or excessive utilization ; and (B) in paragraph (2)(B)— (i) by inserting after gross overuse, the following: excessive utilization, ; and (ii) by striking or inappropriate or medically unnecessary care and inserting inappropriate or medically unnecessary care, or prescribing or billing practices that indicate abuse or excessive utilization . (2) Effective date The amendments made by paragraph (1) shall take effect with respect to retrospective drug use reviews conducted on or after October 1, 2020. 1005. Guidance to improve care for infants with neonatal abstinence syndrome and their mothers; GAO study on gaps in Medicaid coverage for pregnant and postpartum women with substance use disorder (a) Guidance Not later than 1 year after the date of the enactment of this Act, the Secretary of Health and Human Services shall issue guidance to improve care for infants with neonatal abstinence syndrome and their families. Such guidance shall include— (1) best practices from States with respect to innovative or evidenced-based payment models that focus on prevention, screening, treatment, plans of safe care, and postdischarge services for mothers and fathers with substance use disorders and babies with neonatal abstinence syndrome that improve care and clinical outcomes; (2) recommendations for States on available financing options under the Medicaid program under title XIX of such Act and under the Children’s Health Insurance Program under title XXI of such Act for Children’s Health Insurance Program Health Services Initiative funds for parents with substance use disorders, infants with neonatal abstinence syndrome, and home-visiting services