What is the deadline to file an insurance appeal in Delaware?

You have 180 days from the date of your denial letter to file an internal appeal with your insurance company. For external review, you have 120 days after the internal denial. Expedited appeals may have shorter timelines.

Does the Delaware Autism Insurance Act cover ABA therapy for adults?

The Delaware law mandates coverage for children up to age 21. For adults over 21, coverage depends on the specific plan. Some large employer plans or Medicaid may still cover ABA beyond age 21, but it is not guaranteed under the state mandate.

Can I appeal if my insurance says ABA is 'experimental'?

Yes. ABA is recognized by the Surgeon General, the American Academy of Pediatrics, and the National Institute of Mental Health as an evidence-based treatment. Include citations and a strong letter of medical necessity. External reviewers often overturn such denials.

What if my child's ABA provider is out-of-network?

You may still appeal using out-of-network benefits if your plan offers them. You can also request a single-case agreement between the provider and your insurer. If the plan has no out-of-network ABA coverage, you can argue that no in-network provider is available to meet your child's needs.

How can ABA For My Child help with the appeals process?

ABA For My Child is a free matching service that connects families with vetted, BCBA-led providers in Delaware. Many of these providers have experience writing medical necessity letters and navigating insurance appeals. We can help you find a clinic that will support you through the process.

Does Delaware Medicaid cover ABA therapy?

Yes, Delaware Medicaid (DMMA) covers ABA therapy for children under 21 as part of the Early and Periodic Screening, Diagnostic and Treatment (EPSDT) benefit. If you are denied by Medicaid, you also have appeal rights through the state's administrative hearing process.

Delaware Autism Insurance Appeals: Step-by-Step Playbook

In short: If your insurance denies coverage for ABA therapy in Delaware, you have the right to appeal. Start by reading your denial letter carefully, gather supporting medical records and a letter of medical necessity from your BCBA or physician, file an internal appeal within 180 days, and if denied again, request an external review through the Delaware Department of Insurance. The state's autism insurance law requires coverage for medically necessary ABA for children under 21, so persistence often pays off.

Why Insurance Denials Happen for ABA Therapy in Delaware

Insurance denials for applied behavior analysis (ABA) therapy can feel defeating, but they are often the result of a misunderstanding or missing documentation rather than a final verdict on your child's medical necessity. Common reasons denials occur include: the insurer claims the treatment is not medically necessary, the service is deemed experimental (despite ABA being backed by decades of research), or the provider is not in-network. Other times, denials come because the plan requires prior authorization that wasn't filed correctly, or because coverage limits have been misinterpreted. Understanding the specific reason on your denial letter is the first step toward a successful appeal.

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Know Your Rights Under Delaware Law

Delaware families have strong protections thanks to the Delaware Autism Insurance Act (Title 18, Chapter 33A). This law requires health insurance plans regulated by the state (including individual, group, and some self-funded plans) to cover diagnosis, evaluation, and treatment for autism spectrum disorder, including ABA therapy, for children up to age 21. The law caps annual out-of-pocket costs and prohibits lifetime dollar limits on autism-specific treatment. It also mandates that coverage be provided at parity with other medical conditions. However, not all plans are subject - large employer self-funded plans are governed by ERISA and may follow different rules. If you are unsure, your plan documents should specify whether state mental health parity laws apply.

What to look for in your policy

Check your insurance certificate or summary of benefits for language about pediatric autism coverage, ABA therapy, and the maximum amount allowed per year. Delaware law sets a minimum of $36,000 per year in ABA coverage for children up to age 21, though many plans offer more. If your plan fails to mention ABA, contact your insurer and ask explicitly. If they deny coverage based on a plan exclusion, you may still have grounds for appeal under the state's mental health parity provisions.

Step 1: Read and Understand Your Denial Letter

Your denial letter contains critical information: the date of service, the specific reason for denial (e.g., "not medically necessary" or "experimental treatment"), the exact policy language cited, and your appeal rights. Look for the deadline to file an internal appeal - Delaware gives you at least 180 days from the date of denial. Also note whether the letter came from your insurance company or a third-party administrator. Preserve all correspondence, including envelopes and dates. If the denial reason is vague, call the insurer's customer service and ask for the specific clinical criteria used to make the decision.

Common denial codes and their meanings

Not medically necessary: The insurer believes ABA is not required based on the severity of your child's needs. This is the most common and most often overturned with a strong medical necessity letter.
Experimental: Although rare for ABA, some plans try to classify it this way. Your clinician's letter should reference evidence-based guidelines and peer-reviewed studies.
Out-of-network provider: If you are using a BCBA who isn't in-network, you may still be able to get coverage under an out-of-network benefit or request a single-case agreement.
Prior authorization not obtained: This is a technical denial. You may need to request retroactive authorization or demonstrate that the service was emergency-adjacent.

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Step 2: Gather Your Appeal Documents

The heart of any successful appeal is a compelling letter of medical necessity written by your child's Board Certified Behavior Analyst (BCBA) or developmental pediatrician. This letter should explain your child's diagnosis, behaviors, functional limitations, and why ABA therapy is essential to their development. Include specific data: number of hours per week recommended, treatment goals, and progress made to date. Attach copies of your child's autism diagnostic evaluation, any speech or occupational therapy reports, and your insurance policy's relevant coverage pages. Also include a timeline of treatment and any previous authorizations. If you were already receiving ABA before the denial, note the interruption of care and the potential regression it could cause.

Sample checklist for your appeal packet

Copy of the denial letter
Letter of medical necessity from your child's BCBA or physician
Diagnostic evaluation (ADOS, CARS, or similar) for autism spectrum disorder
Individualized treatment plan or behavior intervention plan (BIP)
Progress data or functional behavior assessment (FBA)
Any previous authorizations for ABA therapy
Relevant policy pages showing coverage for autism treatment
A cover letter from you summarizing your request

Step 3: File the Internal Appeal

An internal appeal is reviewed by your insurance company's own clinical staff. In Delaware, you must file this within 180 days of the denial date. File by certified mail or through the insurer's online portal, keeping proof of submission. In your appeal letter, clearly state that you are exercising your rights under the Delaware Autism Insurance Act and the Affordable Care Act's external review provisions. Address each reason for denial head-on. For example, if they said "not medically necessary," explain how your child's behaviors meet the diagnostic criteria and how ABA is the standard of care. Include a request for an expedited appeal if your child's health is at risk - the insurer must respond within 72 hours for expedited reviews.

The insurer must respond to your internal appeal within 30 days for standard reviews (or 60 days if you are requesting a pre-service authorization). If they uphold the denial, they must provide a written explanation and inform you of your right to external review. If they overturn the denial, you should receive a new authorization for services.

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Step 4: Prepare for the External Review

If the internal appeal is denied, you can request an independent external review through the Delaware Department of Insurance. This review is conducted by an independent third party, not your insurance company. You must request the external review within four months (120 days) of the internal denial date. The Department of Insurance will assign a reviewer who is a clinician with expertise in autism treatment. Submit the same documentation you used for the internal appeal, plus the internal denial letter. For expedited reviews (health imminent), the decision comes within 72 hours; standard reviews take up to 45 days. External review decisions are binding on the insurer.

To request an external review in Delaware, call the Delaware Department of Insurance's Consumer Services Division at 1-800-282-8611 or visit their website. You can also ask your insurer to initiate the external review on your behalf. Make sure to keep copies of everything you send.

Step 5: While You Wait - Options for Continuity of Care

Appeals can take weeks or months. During that time, your child may lose valuable therapy hours. Explore options for temporary coverage: some providers offer sliding-scale fees, and many ABA clinics will work with families to continue services pending appeal. You may also be eligible for a continuation of coverage pending the external review if the plan has a policy for such. Alternatively, apply for Delaware's Medicaid program (DMMA) if you meet income guidelines; Medicaid covers ABA for children under 21 through its EPSDT benefit. Another resource is the Delaware Department of Health and Social Services' Division of Developmental Disabilities Services (DDDS), which can help with case management. And remember, ABA For My Child is always here to help you find a vetted BCBA-led provider - we can even connect you with clinics experienced in insurance appeals.

Tips for a Stronger Appeal

Work with your BCBA or clinic from the start

Your child's BCBA is your greatest ally. They can write the medical necessity letter, supply data, and sometimes even speak directly with the insurance reviewer. If you are not yet connected with a provider, use ABA For My Child to get matched with a vetted BCBA-led clinic in Delaware that knows the local appeals landscape.

Use the right language

Include phrases from the Delaware Autism Insurance Act and your policy language. For instance, mention that ABA is a "medically necessary treatment for autism spectrum disorder" and that it "addresses core deficits" as defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM-5).

Keep a log

Document every phone call: date, time, the name of the person you spoke with, and what was discussed. This can help you catch mistakes or inconsistent explanations.

Don't give up

Appeals are intentionally designed to be cumbersome, but many families succeed. According to a report by the National Association of Insurance Commissioners, state external review overturns insurer denials in about 40-60% of cases. Persistence pays off.

When to Seek Professional Help

If the process feels overwhelming, consider hiring a patient advocate or a health care attorney who specializes in insurance appeals. Some non-profits offer free assistance. Also, the Delaware Department of Insurance's Consumer Services team can help you understand your rights and may facilitate a review. Remember, you are not alone - ABA For My Child can guide you to providers who have experience with the appeals process in Delaware.

Delaware Autism Insurance Appeals: A Step-by-Step Playbook

Key takeaways

Why Insurance Denials Happen for ABA Therapy in Delaware