A post-master’s certificate is the best way to bridge from FNP to PMHNP as one of the shortest options for a master’s level education.Our PMHNP certificate can be completed in 20 months, providing current FNPs a fast path to taking the next step in their NP career. Discover the Herzing post master's PMHNP programExplore Now Other Questions Is it worth the cost for LPN school? How much does the Herzing 3-year BSN program cost? What is a medical records technician? Do you need a BSN to be a nurse practitioner?