How to Get an Autism Diagnosis in California
Last updated April 20, 2026 - Reviewed by Autism Hearts Editorial Team
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A complete guide to autism evaluations in California, covering Regional Centers, Lanterman Act rights, and insurance mandates.
- Reviewed by Autism Hearts Editorial Team.
- Last updated April 20, 2026.
- Primary topic: how to get autism diagnosis in California.
Editorial Review
This guide is reviewed by the Autism Hearts editorial team and written to help families move from research into practical next steps.
It is educational content and should not replace medical, legal, insurance, or educational advice from licensed professionals and official state agencies.
Last reviewed April 20, 2026 by Autism Hearts Editorial Team
Medical Disclaimer: This guide is for educational purposes only and does not substitute for professional medical advice, diagnosis, or treatment.
If you're wondering how to get an autism diagnosis in California, you have more pathways available than most states — including the unique Regional Center system, which can provide evaluations and services at no cost to families regardless of income. California's Lanterman Act gives individuals with developmental disabilities some of the strongest rights in the country, making early action especially worthwhile.
How to Get an Autism Diagnosis in California: Your First Steps
Start with your child's pediatrician. Share specific concerns — missed milestones, limited eye contact, repetitive behaviors, speech delays — and ask for a referral to a developmental pediatrician or licensed psychologist for a comprehensive autism evaluation.
At the same time, contact your Regional Center immediately. California has 21 Regional Centers across the state, funded by the Department of Developmental Services (DDS). Regional Centers can evaluate children of any age at no cost to families and connect you with services even before a formal diagnosis is confirmed.
To find your Regional Center, visit the California DDS website or call 1-916-654-1987.
Search diagnostic providers in California →
Choosing an Evaluation Center in California
California has world-class diagnostic centers, but waitlists at the most prominent institutions can be long. Here are your main options:
- UCSF Weill Institute for Neurosciences (San Francisco): Nationally recognized autism program; expect 12–18 month waits for new patients.
- Rady Children's Hospital (San Diego): One of the busiest pediatric autism clinics in Southern California; 9–14 month waitlists typical.
- Children's Hospital Los Angeles (CHLA): Strong developmental-behavioral program; 12+ month waits in many specialty tracks.
- Lucile Packard Children's Hospital Stanford: Excellent multidisciplinary team; waits of 8–12 months are common.
- Regional Center evaluations: Often faster — 3–6 months — and free. Your Regional Center may contract with local psychologists to perform the evaluation.
- Private practice psychologists: Frequently have 2–4 month waits; verify they accept your insurance and are familiar with ADOS-2 and DSM-5 criteria.
Getting on multiple waitlists simultaneously is strongly recommended. A Regional Center referral and a private evaluation can proceed in parallel.
California-Specific Programs and Rights (Apply Immediately)
California Early Start (Ages 0–3) Under IDEA Part C, California's Early Start program provides free developmental services for children under age 3 who show signs of delay. You do not need a formal autism diagnosis — only evidence of developmental delay qualifies your child. Contact your Regional Center or call 1-800-515-BABY to start the intake process.
Regional Center Services (All Ages) Once a diagnosis is confirmed, Regional Centers provide ongoing services funded through the Lanterman Developmental Disabilities Services Act. Covered services can include:
- Applied Behavior Analysis (ABA) and other therapies
- Speech, occupational, and physical therapy
- Respite care
- Supported employment and independent living supports (for adults)
- Case management
Regional Center services are provided at no cost to families below the fee schedule threshold and at sliding-scale fees above it.
Lanterman Act Rights California's Lanterman Act is one of the strongest disability services laws in the nation. It gives individuals with autism and other developmental disabilities a legal right to services from Regional Centers — not just the opportunity to apply. If a Regional Center denies a service, you have the right to appeal through a formal fair hearing process.
California Autism Insurance Mandate (AB 88) California law requires most state-regulated health insurance plans to cover medically necessary autism treatments, including ABA therapy, speech therapy, and occupational therapy, with no annual or lifetime dollar caps. Self-funded employer plans (governed by ERISA) may be exempt — check your Summary Plan Description.
What to Expect During an Autism Evaluation in California
A comprehensive evaluation typically includes:
- Parent/caregiver interview covering developmental history and current concerns
- Standardized cognitive and adaptive assessments (e.g., WISC-V, Vineland-3)
- Autism-specific tools such as the ADOS-2 (Autism Diagnostic Observation Schedule) and ADI-R
- Direct observation of your child in structured and unstructured settings
- A written report with diagnostic conclusions and recommendations (usually delivered 2–6 weeks after testing)
Evaluations typically take 4–8 hours spread across one or two appointments. If your child receives an autism diagnosis, take the written report to your Regional Center as soon as possible — it will fast-track service authorization.