No empirical studies of nurse-patient relationships have focused on interpersonal communication and its effects on patient outcomes. In this study, 124 provider-patient interactions of five nurse practitioners (NPs) and four physicians (PHYs) were audiotaped. Communication patterns were examined to determine whether the practitioner's predominant style was informational or controlling and whether style affected patient satisfaction and perceived autonomy support. All providers used predominantly informational styles of communication. Significant differences in communication styles existed between provider groups (F = 5.90, df = 1/8, p =.05) and among individual providers (F = 4.28, df = 8/123, p <.0001). All providers were more controlling in their communication patterns when attempting to make decisions and plan patient care. Examination of communication styles can help NPs develop the skills necessary to provide patient-centered care.