Medical Malpractice lawyer recommendations (Mental health)

Hello! Does anyone have recommendations? Im looking on behalf of my dad, and am looking for a consultation to see if my dad has a case.

Its in regards to a director of a mental health organization who ruined my dad. She barged in on his second appointment (that he paid for) and took the entire time berating him, calling him a bad person, saying things like "You knew this would happen and you chose not to do anything" in regards to not seeking help from social services (Because hes disabled and didnt even know these things existed in the first place), and told him that he "disturbes" her, meanwhile my dad had absolutely no idea who this person even was. Now this director canceled my dad's appointments without telling him, and is demanding $1,200 for appointments he supposedly never paid for in November and December, despite not ever being a patient at this facility at that time.

My dad went to this place to manage his depression, and they made him more depressed than I have ever seen him in my life.

Suffolk County, Islip/Shirley/Bellport/Patchogue/Medford area if that matters