The business performance management platform system and method enables the capture, extraction, data auditing and data validation processes, combined cost accounting and analytical reporting of data required for certain combined financial, clinical operations, physician encounter, patient encounter, electronic health record, and quality of patient care measures; provides close to real-time data access and performance results; provides financial, operational, clinical, physician encounter, patient encounter, electronic health record, and quality performance dashboards and scorecards, summary level reports, Ad hoc reporting, alerting, emailing, and automated reporting and email distribution, alerting, and modeling functions. The results generated from the business performance management platform provide users of the system critical understanding of detailed and summary level data and information, such as: profit/loss characteristics across the longitudinal data elements associated with patient and physician level detail; cost at patient and physician level; expected revenues; payer performance from payer sources and clinical operations performance.