Final answer:
Nurse Practitioners (NPs) are registered nurses with advanced training to diagnose and treat common illnesses. They have completed graduate-level education and are qualified to manage patient care in various medical settings.
Step-by-step explanation:
The type of registered nurse with advanced training to diagnose and treat common illnesses is a Nurse Practitioner (NP). NPs are advanced practice registered nurses (APRNs) who have completed a master's or doctoral degree program and have advanced clinical training beyond their initial professional registered nurse preparation. This advanced training allows them to take patient histories, perform physical exams, order labs, analyze lab results, prescribe medications, and manage overall patient care. They may work in a variety of settings including clinics, hospitals, and private practices, filling a vital role in the healthcare system by providing high-quality care and improving patient outcomes.