We have United Healthcare and have been in your situation.
My son is 2 with hypotonia and receiving OT in a private facility.
It took me over a year to get United healthcare to pay for a portion of his services.
It all depends on who you speak to within the insurance company.
We called for months and spoke to hundereds of different people.
We finally found someone who would approve of the therapy.
My advice is to keep trying until you find someone who will listen.
Ask your therapist to write a letter to the insurance company explaining why the
services are needed.
Good luck.
I do billing for an OT. This is great advice.
But is it practical? Not many parents have the time to speak to "hundreds" of different people, certainly not working parents.