Ancillary Services, HospitalAmbulatory Surgical ProceduresSurgical Procedures, OperativeInpatientsTreatment OutcomeLength of StayHospitalizationPostoperative ComplicationsRetrospective StudiesBariatric SurgeryGeneral SurgeryHospitals, PsychiatricProspective StudiesRehabilitation CentersThoracic SurgeryPsychiatric Department, HospitalTime FactorsCardiac Surgical ProceduresFollow-Up StudiesHospital CostsPatient DischargeUnited StatesPostoperative PeriodSurgery, PlasticSurgery Department, HospitalRisk FactorsPatient AdmissionAmbulatory CareOutpatientsPreoperative CarePostoperative CareCataract ExtractionHealth Care CostsHospital Mortality