You go through ASDEC.
From their website:
ASDEC Referrals to Academic Language Therapists
ASDEC staff provide referrals to diagnosticians who can provide a full range of educational testing and other evaluation services. If testing results reveal learning disabilities in reading and/or math, ASDEC Clinical Directors will refer parents to ASDEC Academic Therapists. In addition, ASDEC also works with parents directly to help them navigate the diagnosis and treatment of their child’s learning disability by offering a range of free and fee-based consultation services. Click here to register for our Academic Therapy Wait list.
https://www.asdec.org/For-Parents