I don't know if this applies where you live, but there can be 2 types of evaluations. Below are excerpts from information at the link below:
Mental Health Assessment also known as a Mental Health Evaluation: Give a a broad overview. Counselors and social workers usually provide mental health assessments rather than psychological evaluations.
Psychological Evaluations:Psychological evaluations, on the other hand, are similar to a mental health assessment, but they go into much more depth with regards to your mental health and particularly how your personality manifests in daily living and relationships. Psychological evaluations, for example, look much closer for “personality disorders” (e.g. narcissism, paranoia, sociopathology, etc.). A “psych eval” report generally takes double the time to accomplish, produces a report 3-4 times as lengthy, and costs from $1500-$3000 depending on local norms and the context of your case. If you need a psychological evaluation for a child custody case it is going to be on the higher end of this cost. This is because most evaluators will be concerned about getting a well-rounded story and it is often a lengthy process (and potentially high conflict situation) to get all information available and interview any parties who may be opposing you. A mental health assessment may be sufficient in a child custody context but be sure to clarify what is needed with your attorney or the court.
https://www.ndsbs.com/blog/difference-between-mental-health-assessment-and-psychological-evaluation 
