In some states, coverage of therapies for autism is mandated by law:

http://www.ncsl.org/issues-research/...tate-laws.aspx

We're in MA and I just learned that this law was passed a couple of years ago. DS1 has a PDD-NOS dx. It's been on my to-do list to call our insurance co. (we have United) and ask if he qualifies for any additional services given this dx. Overall though our plan is really good, with 40 visits per year each for speech and OT. (We've also had PHENOMENAL coverage for my husband's cancer treatment, but that's a different topic).

Something else you might want to look into is if the new dx qualifies your child for a state plan. Again we are in MA; my DS1 already had an ADHD dx but with the PDD-NOS he now qualifies for Mass Health. The rest of the family doesn't because we are above the family income limit. Getting DS1 onto MassHealth has also been on my to-do list for a while, i'm just dreading the paperwork...but I feel much better knowing that I have that option, if we lose our health insurance DS1 will still have coverage for his specialists & therapies.

HTH