Patient ReadmissionPatient DischargeLength of StayRetrospective StudiesMedicareTreatment OutcomeHeart FailureDiagnosis-Related GroupsHospital CostsTime FactorsPostoperative ComplicationsUnited StatesHospitalizationHospitalsHospitalistsRisk FactorsPatient AcuitySurgical Procedures, OperativeHospital MortalityAftercareQuality of Health CareOutcome Assessment (Health Care)Outcome and Process Assessment (Health Care)Quality Indicators, Health CareFee-for-Service PlansAmbulatory Surgical ProceduresFollow-Up StudiesInsurance Claim ReviewHospitals, PsychiatricCohort StudiesProspective StudiesLogistic ModelsRisk AdjustmentContinuity of Patient CarePatient AdmissionMultivariate AnalysisEmergenciesHospitals, TeachingInpatientsHospitals, CommunityRisk AssessmentComorbidityHospitals, VeteransCritical PathwaysMedication ReconciliationHospitals, PediatricEmergency Service, HospitalPneumoniaAcute DiseaseMyocardial InfarctionRecurrenceCardiovascular Surgical ProceduresOntarioAcademic Medical CentersReoperationHealth Services ResearchChi-Square DistributionUtilization ReviewAmerican Hospital AssociationIntensive Care UnitsMedicare Part A