Compendium of U.S. Health Systems

Compendium of U.S. Health Systems: The Compendium of U.S. Health Systems is a suite of files that provides insight into the healthcare organization landscape. It includes data on systems, hospitals, group practices, outpatient sites, nursing homes, and home health organizations. The Compendium files cover a single calendar year, with new years and variables added regularly. AHRQ has released six new files as part of the Compendium of U.S. Health Systems, the foremost public resource for studying characteristics of healthcare organizations over time: The Group Practice linkage files now span 2020-22 and include information on system affiliation, size and billing activity for the nation’s 35,448 group practices. Researchers can now conduct practice-level longitudinal analyses. The Outpatient Site linkage files, which contain street-level information on 279,446 sites, have been updated through 2023. This information complements data on ownership relationships and system affiliations and can be used to classify sites by type, including primary care and behavioral health. The new 2023 Hospital linkage file includes 6,800 hospitals, with data on system affiliation, corporate parents, size and revenue. The System files, the cornerstone of the compendium, now include 2023 data and continue to provide key measures of size, composition, insurance offerings and systemwide hospital revenue for the 639 systems in the compendium. The Compendium of U.S. Health Systems is a product of AHRQ's Comparative Health System Performance Initiative.