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 program Explore Now Other Questions How long does it take to earn a health sciences degree? Is a diploma in bookkeeping and payroll accounting worth it? Does a medical assistant need to be certified? Is the LPN to RN-BSN program hard?