1. Round two competitive bidding for oxygen: continued access for vast majority of beneficiaries Publication: [Washington, D.C.] : U.S. Department of Health and Human Services, Office of Inspector General, May 2018 Subject(s): Competitive BiddingDurable Medical Equipment -- economicsHealth Services AccessibilityInsurance, Health, ReimbursementMedicare -- economicsOxygen Inhalation Therapy -- economicsFraud -- prevention & controlHumansUnited StatesUnited States. Department of Health and Human Services.