title: OAH sues HHS over change in Medicare policy on billing liability insurers.
mesh_terms: D000059:Accidents / Q000191:economics*; D014487:Centers for Medicare and Medicaid Services, U.S.; D003669:Deductibles and Coinsurance / Q000331:legislation & jurisprudence*; D007351:Insurance, Liability / Q000331:legislation & jurisprudence*; D007882:Legislation, Hospital; D006278:Medicare / Q000331:legislation & jurisprudence*; D014481:United States