@stillkickig It sounds like you want your wife to have the best care by the most competent providers. To reiterate what Ginger said, yes PMHNP is a legitimate credentialing. Below is a Mayo Clinic link that explains PMHNP's scope of practice and education.

- Mayo Clinic College of Medicine and Science: Nurse Practitioner: What does a nurse practitioner do?: https://college.mayo.edu/academics/explore-health-care-careers/careers-a-z/nurse-practitioner/

The process of becoming a PMHNP is rigorous and like a physician they have specialized training in their area of choice.

May I ask if your wife is seeing the NP for therapy and/or psychiatric medications?