HCUP is America’s most comprehensive source of hospital data, including information on outpatient, inpatient care, and emergency department visits [6]. Although the databases have limitations in lack of clinical detail such as stage of disease, vital statistics, and laboratory and pharmacy data, as well as the ability to track patients across time and setting varies by state, the defects do not outweigh the merits that HCUP databases have the largest collection of all-payer, uniform, state-based inpatient and ambulatory surgery administrative data in the U.S. [7]. They enable researchers, insurers, policymakers and others to study health care delivery and patient outcomes over time, and at the national, regional, State, and community levels