To explore the effects of policy awareness and perceived value on medical staff's diagnosis and treatment behavior after the Diagnosis-Intervention Packet (DIP) reform, this study conducted a questionnaire survey of 300 medical staff in L City on policy awareness, perceived value, and diagnosis and treatment behavior after the DIP reform in October-November 2023 using convenience sampling. Multifactor linear regression and Bootstrap methods were used to test the mediating role of perceived value on the relationship between policy awareness and diagnosis and treatment behavior. The results showed that medical staff scored (19.24±5.87) for policy awareness, (42.99±12.48) for perceived value, and (31.25±6.06) for diagnosis and treatment behavior. The results of multifactor linear regression analysis showed that medical staff's policy awareness (β=0.13, p<0.01) and perceived value (β=0.38, p<0.001) positively predicted diagnosis and treatment behavior. In addition, Bootstrap results indicated that perceived value partially mediated the relationship between medical staff's level of policy awareness and diagnostic and treatment behaviors, with a mediating effect of 58.06%. Therefore, the higher the medical staff's DIP reform policy awareness score, the higher the perceived value of the policy, which further increases the norms of diagnosis and treatment behaviors.