Categorically trained pediatricians and internal medicine physicians believed that they were no better prepared to care for their patients than medicine-pediatrics-trained physicians. Regardless of their beliefs of their preparedness, medicine-pediatrics physicians in practice spend a significant majority of their time in the care of adults rather than children. Our findings indicate that this is not because of their perception of a lack of training or preparation in the care of children relative to categorically trained pediatricians. Other factors, including but not limited to patient demographic changes, reimbursement for care, and the job market, potentially play a significant role.