It's not even necessary. If she's in the USA, the schools are required to do an evaluation even if her daughter is not enrolled in the public school system.

Send a note to the school formally requesting an evaluation, let those wheels turn. Unless Dad is the usual contact parent - which fathers almost never are - he doesn't even have to know until it's done.

Now, I'll be the first to say that the evaluation by the schools is not always the best, and sometimes you have to go private practice... but it's a place to start while you figure out what insurance will and won't cover if you gotta do it the other way.