Re: mental health certification for nurse practitioner
If you want to work as a psych NP, you need to be certified as either an Adult or Family PMHNP or CNS. FNP, ANP, PNP, etc is not sufficient and it is becoming increasingly difficult for non-psych NPs to work in this capacity as in the past. More employers are requiring certification and more BONs are becoming more stringent with regard to scope of practice. In my PMHNP program, there were 3 FNPs and 1 ANP doing a psych post-master's because the agencies where they worked were psych settings and were now requiring PMHNP certification in order to be reimbursed. This is no different than medicine. You don't see Family Practice physicians or Internists working in psych hospitals other than conducting H&Ps. Sure they prescribe many psych meds as part of typical outpatient practice, but they don't work exclusively in psych.
As far as re-training, go the post-master's route and get it done prior to 2015. You'll be grandfathered in and won't need to get a DNP unless you want one.
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