Little information is presently available about the professionalism of nurse practitioners (NPs). Nor do we know what degree of professionalism is actually exhibited by NPs. Nurse practitioners in this study scored moderately professional. The highest level of education attained had no relationship to degree of professionalism. With increasing age and number of years in practice, NPs expressed a greater degree of professionalism. Nurse practitioners need to continue their development of professionalism, both as individuals and as members of groups and/or organizations. Recommendations for practice, education, and research are discussed.