Using data from the Agency for Healthcare Research and Quality (AHRQ) Compendium of U.S. Health Systems for 2018 and 2020–2023, the NC Rural Health Research Program examined changes in workforce availability within U.S. health systems and assessed associations between workforce per system bed and member hospital characteristics in their brief An Exploratory Analysis of U.S. Health System Workforce Trends . Average workforce levels per system bed increased during the study period for physicians (4.5%), primary care physicians (10.7%), nurse practitioners (66.7%), and physician assistants (66.7%), with the largest growth occurring among nurse practitioners and physician assistants. Regression analyses found that workforce levels were associated with hospital Census region, ownership type, full-time equivalents (FTEs), net patient revenue, operating margin, percent Medicare days, and percent outpatient revenue. These findings suggest that workforce composition within U.S. health systems is changing as consolidation continues, with increasing reliance on advanced practice clinicians.