A method of communicating in a healthcare establishment. The method comprises receiving data indicative of a desire to communicate with a target clinician; receiving data regarding a wirelessly detectable tag associated with the target clinician; determining a location of the target clinician within the healthcare establishment based at least in part on the data regarding the wirelessly detectable tag; applying an unavailability policy to obtain an outcome indicating whether the target clinician is available for communication, the unavailability policy being a function of the location of the target clinician; and responsive to the outcome indicating that the target clinician is available for communication, performing an action to cause communication with the target clinician. In this way, time and effort will not be spent attempting to communicate with clinicians that are not considered to be available, even though they may be registered for duty.