This section describes the original data files obtained from data organizations in participating states and used to create HCUP databases. Information about the source of the original data files, the types of hospitals included in those files, the records excluded during HCUP processing (if any), and other pertinent information to understand the composition of these files are presented. For a description of the file composition for one or multiple States, check the corresponding boxes below and then click the "View File Composition" button.