Communication accommodation theory (CAT) has been used in health contexts to explain and predict when, why, and how people adjust (or not) to other people's communication language and style. By considering a range of micro- and macro-level factors, CAT highlights the way that health systems, such as hospitals, prime a range of group identities, including roles (e.g., patient, clinician), professions (e.g., doctor, nurse), and/or specialties (surgical nurse, cardiologist). Communication encounters in healthcare settings are influenced by these group identities, whereby interactants use a range of strategies to adjust their communication either to be more like their communication partner (i.e., accommodation) or to be less similar (nonaccommodation). Communication can be more interpersonal or intergroup depending on a range of factors, such as sociocultural norms, relationships between the groups, and the history between the interactants. CAT addresses a key criticism of communication research by highlighting the intergroup nature of health communication. The model lends itself to understanding patient–clinician communication, interprofessional communication, and health communication interventions, which may improve health service delivery and patient safety.