Mental Health: Toddler, Safeway

Autism Evaluation Vs. OCD and Tic Evaluation.

My son is on a 4-6 month waiting list to be evaluated for autism. But my concerns are more than just that. He also displays some OCD and tics. Which is more important to get diagnosed? One is neurodevelopment while the other is mental heath so two different categories they told me. Since my insurance isn't great, I have to pick one. Is some of the tics and OCD related to autism? If you have had your child diagnosed, any advice would be appreciated. Thank you!