Why is the regulation of advanced practice essential?

For many years, nurses have sought to define advanced practice (AP). There is now a developing consensus that it should be broadly defined in ways which include and embrace not only clinical practice, but also other domains such as education, management and leadership. This broad definition is congruent with Benner's notion of the novice to expert trajectory and lends support to the view that the risks around AP are minimal, since advanced practitioners by definition have expertise. The broad model of AP, however, ignores one distinct subset of advanced practice nurses who we term nurse practitioners (NPs). NPs are distinct because of their hybrid, quasi-medical practice, which crucially involves autonomous medical diagnosis and treatment. The risks in this area of practice are substantial, and consequently require nothing less than a nationally-regulated set of benchmarks. These must address the training, assessment and registration of NPs for the primary purpose of public protection.