Objective. To determine national estimates of computerized physician order entry (CPOE) use for 2003 in hospitals that care for children. Design. Retrospective cohort analysis. Results. Six percent of the hospitals used CPOE (119 out of 2145). Children's hospitals are more likely to use CPOE than a children's unit (odds ratio [OR] = 6; 95% confidence interval [CI] = 1.5-23.9). Private for-profit hospitals are more likely to use CPOE than public hospitals (OR = 26.5; 95% CI = 3.1-224.8). Urban teaching hospitals are more likely to use CPOE than rural hospitals (OR = 3.9; 95% CI = 1.7-8.8). Hospitals in the Northeast, Midwest, and South are more likely to use CPOE than hospitals in the West (OR = 11.2, 95% CI = 4.8-26.5; OR = 4.2, 95% CI = 1.7-10.5; OR = 3.1, 95% CI = 1.5-6.3, respectively). Conclusions. In 2003, 6% of the hospitals that care for children reported using CPOE. Early adoption of CPOE was associated with children's hospitals, private hospitals, urban-teaching hospitals, and hospitals outside of the western region.