Time is fundamental to organizing all aspects of human life. When invested in relationships, it has a psychological meaning as it indicates how much individuals value others and their interest in maintaining social relationships. Previous research has identified an intergroup time bias (ITB) in racialized social relations, defined as a discriminatory behavior in which White individuals invest more time in evaluating White than Black individuals. This research proposes an aversive racism explanation for the ITB effect and examines its consequences in the medical context. In four experimental studies (N = 434), we found that White medical trainees invested more time in forming impressions of White (vs. Black) male patients. Study 5 (N = 193) further revealed more time investment in diagnosing, assessing pain, and prescribing opioids for White than Black male patients. This biased time effect mediated the impact of patients' skin color on health care outcomes, leading to greater diagnostic accuracy and pain perception, and lower opioid prescriptions. A meta-analytical integration of the results (Study 6) confirmed the ITB effect reliability across experiments and that it is stronger in participants with an aversive racist profile (vs. consistently prejudiced or nonprejudiced). These findings provide the first evidence that bias in time investment favoring White (vs. Black) patients is associated with aversive racism and impacts medical health care outcomes. Furthermore, these results offer insights into the sociopsychological meaning of time investment in health care and provide a theoretical explanation for an understudied insidious form of discrimination that is critical to comprehending the persistency of racial health care disparities. (PsycInfo Database Record (c) 2023 APA, all rights reserved).