For anyone interested in an update, I complained and held a meeting. My boss profusely apologized, and appeared sincere that he honestly thought this was already in my contract. (Earlier this year we had discussed the possibility of supervision, as I had inquired about it, but it wasn't anything set up at that time so we never went into detail about it.) My employer is giving me the option to either accept or reject this supervisory role (and if I choose the latter, they will look into seeing if other providers would work with this NP). So it's not a huge problem at this time; if I don't like it I can still tell them no thank you. Without getting into specifics here, I would be expected to review a small percentage of the NP's notes (might be something like 5 notes per week), provide guidance as needed, and I would receive additional compensation for this work. I can choose which types of cases the NP would see, and I would approve the hiring of any future NPs should I wish for more. After our meeting today, I was feeling better about the situation, and I was given time to make my decision.