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 How much does the Herzing MSN program cost? What classes do you take for a business management degree? What does a software developer do? How much does an RN make in Alabama?