In this part, the term “ uncompensated care costs ” means unreimbursed costs from serving self-pay, charity, or Medicaid patients, without regard to payment under section 1396r–4 of this title , all of which are attributable to emergency care and trauma care, including costs related to subsequent inpatient admissions to the hospital. (July 1, 1944, ch. 373, title XII, § 1246, as added Pub. L. 111–148, title III, § 3505(a)(6) , Mar. 23, 2010 , 124 Stat. 525 .)