WASHINGTON, D.C. - In a divided opinion, the U.S. Supreme Court on March 20 held that an anti-lien provision contained in the federal Medicaid Act preempts North Carolina's irrebuttable statutory presumption that one-third of a tort recovery is attributable to medical expenses (Aldona Wos, secretary of North Carolina Department of Health and Human Services v. E.M.A., a minor, by and through her guardian ad litem, Johnson, et al., No. 12-98, U.S. Sup.).