; moratorium; outpatient hospital facilities; audits Subsection (c) of section 340B of the Public Health Service Act ( 42 U.S.C. 256b ) is amended to read as follows: (c) Covered entities that are private, non-Profit DSH hospitals (1) Study and report (A) Study The Comptroller General of the United States shall conduct a study on the relationship between the disproportionate share adjustment percentages of private covered entities described in subclauses (II) and (III) of subsection (a)(4)(L)(i) and the levels of charity care provided by such entities to outpatients. (B) Report Not later than 180 days after the date of enactment of the 340B Protection and Accountability Act of 2019 , the Comptroller General shall submit to the appropriate committees of Congress a report on the results of the study conducted under subparagraph (A), including recommendations on a metric that, as applied to a private covered entity described in such subparagraph, reflects a high level of charity care provided to outpatients as a percentage of the covered entity’s overall expenses for outpatient care, and could replace the metric described in subclause (ii) of subsection (a)(4)(L). The Comptroller General shall recommend the metric that best aligns with the level of charity care provided to outpatients as a percentage of overall hospital operating expenses on outpatient care if no metric is identified that provides a precise measure of such percentage. (2) Moratorium (A) In general For the period described in subparagraph (B)— (i) a private covered entity described in subclauses (II) or (III) of subsection (a)(4)(L)(i) may participate in the drug discount program under this section as a covered entity only if it was properly enrolled as a covered entity in the drug discount program under this section as of the date of the enactment of the 340B Protection and Accountability Act of 2019 and continuously enrolled thereafter