We surveyed 9384 active programs, of which 8943 (95.3%) completed the program survey and 8200 (87.4%) confirmed the status of all their active physicians-in-training, accounting for 109 755 (95.3%) of active trainees. An additional 89 programs (0.9%) confirmed some but not all of their trainees (2431 trainees, 2.1%), 236 confirmed that they did not have any trainees (2.5%), 271 programs (2.9%) confirmed the status of nonactive trainees (graduates and transfers), but did not have any currently active trainees, and 588 programs (6.3%) did not confirm the status of any physician training in the program (including 389 programs that apparently did not have any active trainees). A total of 95.9% of all physicians in our database had their status confirmed (eg, active, graduated, transferred, withdrawn). Physicians whose status was not confirmed were “advanced” into the next year of training (n = 2924 [2.5% of active residents]) or “graduated” based on expected graduation date (n = 1812 [4.6% of graduated residents and fellows]). In total, we estimate that there were 115 111 active residents in ACGME-accredited programs during the 2012-2013 academic year. The following tables (Table 1, Table 2, Table 3, Table 4, Table 5, Table 6, Table 7, Table 8, Table 9, and Table 10) contain data from these surveys.