Does Insurance Cover ABA Therapy in Washington?

Find out if your Washington plan covers ABA therapy and what to do if it doesn't.

State coverageAugust 2, 2026

How Washington's Autism Mandate Works

Washington has a state law that requires many health plans to cover autism treatment, including ABA therapy. But that law only applies to plans that are fully insured, meaning the employer buys coverage from an insurance company and the state regulates it.

If your plan is self-funded, your employer pays claims directly and the plan falls under federal ERISA rules. State mandates don't bind those plans, so coverage is not guaranteed. That's why two families working at the same company can get different answers: one may have a fully insured plan, the other self-funded.

Your plan type is listed on your insurance card or in your benefits summary. If you're not sure, ask your HR department directly.

Fully insured plans: state mandate applies, ABA coverage is required.
Self-funded plans: state mandate doesn't apply, but many cover ABA anyway.
Check your plan documents or call the number on your card to confirm.

Ask HR and Your Insurer These Exact Questions

Before calling an ABA agency, get the facts from your plan. Ask HR: 'Is our health plan fully insured or self-funded?' Then call the benefits line on your insurance card and ask: 'Does my plan cover medically necessary ABA therapy for autism?'

If the answer is yes, follow up with: 'What are the specific coverage limits, such as visit caps or dollar maximums?' Those limits vary by plan, so don't rely on what a friend's plan covers. Get the details in writing if you can.

Ask HR: 'Is our plan fully insured or self-funded?'
Ask insurer: 'Does my plan cover ABA therapy?'
Ask insurer: 'What are my plan's limits for ABA coverage?'

What Prior Authorization Requires

Most plans require prior authorization before ABA services start. That means your provider sends a treatment plan to your insurer for approval before you begin.

Typically, you'll need a formal autism diagnosis from a qualified professional, like a developmental pediatrician or psychologist. The treatment plan should include the number of hours per week, the goals, and the expected duration. Your ABA agency will usually handle the paperwork, but you'll need to provide the diagnosis.

Ask your insurer how long the authorization review takes and what the appeal deadline is if they deny it.

If Your Plan Denies Coverage

A denial is not the end. You have the right to appeal, and you should. Start by asking for the denial in writing and the specific reason.

Then work with your ABA provider to strengthen the appeal. They can provide clinical documentation, progress notes, and a letter explaining why the treatment is medically necessary. Many denials are overturned on appeal.

If your plan is fully insured, you can also contact the Washington State Office of the Insurance Commissioner for help. They handle consumer complaints about insurance companies.

Apple Health for Families Who Qualify

If you have Apple Health, Washington's Medicaid program, ABA therapy is covered for children under 21 when it's medically necessary. That's guaranteed by federal EPSDT rules, which require states to cover all medically necessary services for kids.

You don't need a separate ABA rider. Your child's doctor or a qualified professional must document the medical necessity. Your managed care plan, the name is on your member card, will have a process for approving services.

If you don't have Apple Health but think you might qualify, apply through Washington Healthplanfinder. Income limits are higher for children, so even if you don't qualify, your child might.

Finding an ABA Provider in Washington

Once you know your coverage, you can start looking for a provider. Washington has ABA agencies across many counties. The largest concentrations are in King County, Pierce County, and Snohomish County.

When you call an agency, ask if they accept your insurance and if they've worked with your specific plan before. Also ask about waitlists, which can be long in some areas. Some agencies offer in-home services, others have clinics, so ask what fits your family's needs.

Washington listings right now

258 ABA agencies across 19 Washington counties.

Common questions

Does Washington require insurance to cover ABA therapy?

Yes, for fully insured plans. Washington's autism mandate requires these plans to cover ABA. But self-funded employer plans are exempt under federal law, so they aren't required to cover it, though many do anyway.

How do I know if my plan is fully insured or self-funded?

Ask your HR department directly. They'll know. You can also check your summary plan description, which should state the plan type. If you're still unsure, call the number on your insurance card and ask.

What is prior authorization for ABA therapy?

It's approval from your insurance company before you start ABA. Your provider submits a treatment plan, and the insurer reviews it to decide if the therapy is medically necessary. You'll need a formal autism diagnosis to start.

Can I appeal if my insurance denies ABA coverage?

Yes. You have the right to appeal any denial. Ask for the denial in writing, then work with your provider to submit a strong appeal with clinical evidence. Many denials are overturned on appeal.

Does Apple Health cover ABA therapy?

Yes, if your child is under 21 and ABA is medically necessary. Apple Health must cover medically necessary services for kids under federal EPSDT rules. Your managed care plan will have a process for approval.

What if my plan has a dollar cap or visit limit for ABA?

Limits vary by plan. Some plans have annual caps, others have lifetime limits, and some have none. Call your insurer and ask for the specific limits on your plan. Get them in writing so you know what to expect.