If the provider has paid for their insurance policy, then they are not 'profiting off themselves' by using their benefits to obtain a service to which they are entitled under their policy - the provider employs the PA, so if they are using the PA's services, then they are incurring a cost to which they may be entitled to reibursement.
That said, this could potentially be considered a violation of self-referral laws, because providers are not supposed to refer services to entities in which they have an ownership interest. But there are a lot of loopholes and exceptions in those laws, and if it is just an isolated instance, it's unlikely to be considered a serious problem. If you are concerned about it, though, then you should ask your practice's compliance officer or legal adviser to review the situation and give their input - legal questions like this are complex and you need someone with expertise and access to the facts of the situation to get to the right answer.