Medical professionalism is demonstrated through specific behaviors that vary by person and setting. It is unknown if medical discipline also affects professionalism behavior and/or the degree to which a specific behavior is linked to professionalism. Methods: Faculty from 4 core disciplines (Surgery, Pediatrics, Ob/Gyn and Medicine) developed a 20-item professionalism behavior measurement tool with a 7 point Likert scale anchored by ‘Always’ and ‘Never’. Residents (n=73) were asked to rate one faculty member whom they considered ‘Outstanding’ in professionalism, and another who was opposite. For each discipline, we measured the correlation of 19 items with a 20th item, ‘Exemplifies Professionalism’. We then compared the absolute strength of the correlation (coefficient ‘r’) and the relative ranking (1-19) of the relationship of the behavior to professionalism for each discipline. Results: Five items (*) were similarly ranked by all disciplines, while 7 more were similarly ranked by all but one discipline (#), and 2 (**) showed Surgery (Surg) and Obstetrics/Gynecology (Ob/G) differing from Medicine (Med) and Pediatrics (Ped). The table below shows the correlation coefficient between the professionalism behavior item below and “Exemplifies Professionalism/the ranking (# 1-19) of the correlation coefficient for the discipline. Conclusions: Most items were either ranked similarly across specialties, or a single discipline (Pediatrics × 5; Medicine × 2) diverged. Neither Surgery nor Obstetrics/Gynecology diverged alone, but both ranked ‘Demonstrates personal integrity and a willingness to take a stand on principle’ higher and ‘Aware of own limitations; seeks and accepts constructive feedback’ lower as professionalism correlates than did the medical disciplines. More work will need to be done to determine whether the instances when a single discipline diverged reflect an idiosyncrasy of a particular department, or a stable tendency associated with the culture of a medical discipline. It seems distinctly possible that the medical/surgical difference for two behaviors in their relative importance as professionalism correlates may reflect the different kind of work and/or the different characteristics of the people who choose to enter surgical versus medical disciplines.