Hi All!
I worked in insurance land on the clinical side for over 8 years on various states and contacts.
What Queen quoted is unfortunately pretty typical. Any personality disorder as a primary diagnosis is usually not billable. Thankfully, few other disorders have this exclusion.
Sunrise- if i had to guess why your PNP does this, she is probably able to justify a longer treatment plan to the insurance company and get more session for with a mood disorder rather than ADHD.
Hope this helps!