This doctoral research investigates teamwork, specifically collaboration, at two different hospitals both of which were highly involved in the promotion of interprofessional collaboration. The analysis of the field observations and data collected revealed that this concept did not accurately reflect daily interactions between health care professionals, but that other forms of interaction such as coordination and cooperation were more frequent. Furthermore, the use of these more specific concepts to discuss teamwork in health care enabled important differences to be observed between the clinical settings. The impact of this research in practice suggests that adopting more specific concepts would make it easier to identify relevant literature and to design policies and educational programmes that address teamwork in health care.