Risk-Standardized Rate of All-cause Readmission to the Discharging Hospital and Hospitalist Physician Group within 30 Days of Initial Hospital Discharge Performance Rate Descriptions: Rate 1: Readmission Rate for All Discharged Inpatients (Overall Reporting Rate) Rate 2: Readmission Rate for Discharged Pneumonia Patients Rate 3: Readmission Rate for Discharged CHF Patients Rate 4: Readmission Rate for Discharged COPD Patients