Graduation from this MSN specialty prepares you to take the Adult-Gerontology Primary Care Nurse Practitioner exams, offered by the American Nurses Credentialing Center and/or the American Association of Nurse Practitioners. The purpose of the American Academy of Nurse Practitioners National Certification Board is to provide a valid and reliable program for entry-level nurse practitioners to recognize their education, knowledge, and professional expertise. AANPCB provides a process for validation of an advanced practice registered nurse's qualifications and. Nurse practitioners are healthcare professionals educated and trained to provide health promotion and maintenance through the diagnosis and treatment of acute illness and chronic conditions. According to the International Council of Nurses, an advanced practice registered nurse (APRN) is "a registered nurse who has acquired the expert .