; (3) guidance and technical assistance to State Medicaid agencies regarding additional flexibilities and incentives related to screening, prevention, and postdischarge services, including parenting supports, and infant-caregiver bonding, including breastfeeding when it is appropriate; and (4) guidance regarding suggested terminology and ICD codes to identify infants with neonatal abstinence syndrome and neonatal opioid withdrawal syndrome, which could include opioid-exposure, opioid withdrawal not requiring pharmacotherapy, and opioid withdrawal requiring pharmacotherapy. (b) GAO study Not later than 1 year after the date of the enactment of this Act, the Comptroller General of the United States shall conduct a study, and submit to Congress a report, addressing gaps in coverage for pregnant women with substance use disorder under the Medicaid program under title XIX of the Social Security Act, and gaps in coverage for postpartum women with substance use disorder who had coverage during their pregnancy under the Medicaid program under such title. 1006. Medicaid health homes for substance-use-disorder Medicaid enrollees (a) Extension of enhanced FMAP for certain health homes for individuals with substance use disorders Section 1945(c) of the Social Security Act ( 42 U.S.C. 1396w–4(c) ) is amended— (1) in paragraph (1), by inserting subject to paragraph (4), after except that,