Fixing PPS.
D002391:Catchment Area, Health; D014487:Centers for Medicare and Medicaid Services, U.S.; D005843:Geography; D006761:Hospitals; D011445:Prospective Payment System / Q000331:legislation & jurisprudence*; D012051:Reimbursement Mechanisms / Q000331:legislation & jurisprudence*; D012424:Rural Population; D012720:Severity of Illness Index; D013223:Statistics as Topic; D014481:United States; D014505:Urban Population