title: Berwick's premiere. CMS chief faces off against GOP on ACA's merits.
authors: Jessica
authors: J
authors: Zigmond
mesh_terms: D000288:Administrative Personnel; D014487:Centers for Medicare and Medicaid Services, U.S.; D005104:Expert Testimony; D058991:Patient Protection and Affordable Care Act / Q000331:legislation & jurisprudence*; D011057:Politics; D014481:United States