Maria T. Codina Leik, MSN, APRN, BC, FNP-C, is a practicing NP in Internal Medicine at Plantation (FL) Medical Clinic and President and Principal Lecturer, National ARNP Services, Inc., her own company. She is a popular speaker and teacher known for her ability to simplify complex concepts for her students. Previously, she taught in the NP program at Florida International University School of Nursing. Ms. Leik is Board Certified in three specialties: Adult NP, Family NP, Gerontologic NP by the ANCC and AANP. Her research findings have been presented at an international HIV conference as well as at nursing conferences. She has written two additional NP certification review books and is the author of several book chapters in NP textbooks. She is a member of STT International Honor Society.