Patient AdmissionMedicareCenters for Medicare and Medicaid Services (U.S.)Medicare Part AUnited StatesMedicare Part BFee-for-Service PlansHospital-Physician Joint VenturesInsurance Claim ReviewPatient ReadmissionSkilled Nursing FacilitiesReimbursement MechanismsProspective Payment SystemHospitalizationHospitalsRisk AdjustmentRetrospective StudiesHospital MortalityDiagnosis-Related GroupsHealth Services ResearchSurgical Procedures, OperativeQuality of Health CareLength of StayPatient DischargeHospital ChargesInsurance, Pharmaceutical ServicesOutcome Assessment (Health Care)Logistic ModelsManaged Care ProgramsHospital CostsSEER ProgramCohort StudiesMyocardial Infarction