This study aims to evaluate the effect of the intensity of interprofessional collaboration on hospitalized cancer patients. We conducted a cross-sectional study of 312 patients to examine the effects of intensity of interprofessional collaboration (low vs high intensity collaboration) on patient satisfaction, uncertainty, pain management, and length of stay. Data on the intensity of interprofessional collaboration, patient satisfaction, and uncertainty were collected from professionals and patients using valid and reliable instruments. Administrative and clinical records were used to calculate the index of pain management and length of hospital stay. The analysis revealed the existence of significant differences between patients who are cared for by teams operating with a high intensity of collaboration and those who are cared for by teams operating with a low intensity of collaboration, as measured by the mean satisfaction (P < .001) among a specific group of patients (patients who have a high level of education and perceive their state of health as poor), mean uncertainty (P = .047), and adequacy of pain management (P = .047). The analysis also found no significant difference (P = .217) in their length of hospital stay. The findings suggest that intensity of interprofessional collaboration has a positive effect on patient satisfaction, reduces uncertainty, and improves pain management, yet they also suggest that the degree of collaboration does not influence the length of hospital stay.