My son turns 18 in March but graduates in June. Does his coverage stop in March?

Not under the Florida mandate, if he was diagnosed with a developmental disability at age 8 or younger. The statute covers someone 18 or older who is in high school and meets that diagnosis-age test. Coverage under the mandate would end when he leaves high school. Confirm with your plan, since it applies the rule and may ask for proof.

My daughter was diagnosed with autism at 10. Is she covered after 18?

Not under the Florida mandate, unless she was diagnosed with another developmental disability at 8 or younger. The statute's 18-plus rule requires a diagnosis at 8 or younger. Her plan may still cover ABA by its own terms, so ask whether ABA has an age limit. TRICARE and many self-funded plans do not use the Florida rule.

Does the age rule apply to self-funded employer plans?

No. Florida's mandate, including its age rules, does not reach self-funded employer plans. Those plans set their own ABA terms in the plan document, subject to federal law. Some have no age limit, some use one. The UMR guide shows how one common administrator handles ABA.

Can ABA for a young adult focus on job or independence skills?

Often, yes, as long as goals tie to the person's diagnosis and needs. Note that some insurer policies exclude services that are mainly educational or vocational, such as Cigna's policy. Goals for daily living, communication, safety and community skills are common. The BCBA writes goals with the family, and the plan decides coverage.

ABA Coverage After 18 in Florida: The Age Rules

Many families worry that ABA coverage ends on their teen's 18th birthday. In Florida it can continue for some students, but the rule has two conditions that are easy to miss. This article explains exactly who stays eligible under Florida's autism insurance law, what happens after high school, and the other routes that can pay for support for young adults. For what ABA looks like at this age, see ABA for teenagers.

What does Florida law say about age?

Florida's Steven A. Geller Autism Coverage Act (sections 627.6686 and 641.31098, Florida Statutes) requires certain group health plans to cover treatment of autism and Down syndrome, including applied behavior analysis (ABA), for an "eligible individual." Paragraph (2)(c) defines that term:

"'Eligible individual' means an individual under 18 years of age or an individual 18 years of age or older who is in high school who has been diagnosed as having a developmental disability at 8 years of age or younger."

So there are two groups:

Under 18: eligible, if the plan is one the law covers.
18 or older: eligible only while both of these are true: the young person is in high school, and they were diagnosed with a developmental disability at age 8 or younger.

Remember that the law applies only to fully insured large-group plans from Florida-licensed insurers, group HMOs and the State Group Insurance Program. It does not reach self-funded employer plans, small-employer plans, individual plans or plans issued in another state. If your plan is outside the law, the age rules below come from your plan instead. The guide to Florida's autism insurance law covers the rest of the statute.

How do the high school and "diagnosed by 8" rules work in practice?

Here are some examples, using a fully insured large-group plan. They are illustrations of how the statute's words read, not coverage decisions, which your plan makes.

Examples of the 18+ rule (illustrations only)
Young person	In high school?	Diagnosed at 8 or younger?	Eligible under the statute?
Age 18, senior, autism diagnosed at 3	Yes	Yes	Yes
Age 19, still in high school, autism diagnosed at 12	Yes	No	No
Age 18, graduated last month, diagnosed at 4	No	Yes	No
Age 17, autism diagnosed at 14	Not needed under 18	Not needed under 18	Yes, until 18

A few details are worth knowing:

"Developmental disability" is broader than autism. The insurance statute does not define the term. Florida's developmental disabilities law (section 393.063) lists conditions including intellectual disability, cerebral palsy, autism, spina bifida and Down syndrome. A teen first diagnosed with autism at 12, but diagnosed with another developmental disability before 9, may want to ask the plan how it reads the rule.
Keep proof of the early diagnosis. If your teen was diagnosed young, find the original evaluation report or medical record that shows the date. Plans may ask for it once your child turns 18.
"In high school" is not defined. The statute does not say how it treats students in exceptional student education programs who stay in school past their senior year, or students in other settings. Ask the plan, in writing, how it applies the words to your teen's situation.
The state employee plan uses the same rule. The 2025 State Employees' PPO and HDHP booklet covers autism and Down syndrome treatment for someone diagnosed at eight or younger who is under 18, or 18 or older and in high school.

What happens to ABA coverage after high school?

Once a young adult leaves high school, the Florida mandate no longer requires their plan to cover ABA. That does not always mean coverage stops. It means the plan's own terms decide.

Employer plans may cover adults by choice. Many self-funded and fully insured plans write their own ABA benefit without an age limit. Some national medical policies describe ABA for older ages. For example, Aetna's ABA medical necessity guide describes "focused" ABA for all ages, alongside "comprehensive" ABA for younger children. Ask your plan whether ABA has an age limit.
Staying on a parent's plan. Under federal law, children can generally stay on a parent's plan as dependents until 26, and some plans allow longer coverage for a dependent who cannot support themselves because of a disability. Ask HR about the plan's rules for a disabled adult dependent.
Parity still applies. If a plan covers autism treatment, federal mental health parity law restricts limits on it that are stricter than limits on comparable medical care. An age cutoff written only for ABA may be worth questioning. See mental health parity and ABA denials.

Are there other ways to pay for support after 18?

TRICARE

For military families, the TRICARE Comprehensive Autism Care Demonstration has no age cutoff. The Defense Health Agency says ABA under the program is "not limited by the beneficiary's age, dollar amount spent, number of years of services received, or number of sessions provided; however, ABA services must be driven by clinical necessity." Eligibility for TRICARE itself as an adult child depends on the sponsor's status and the young adult's situation. See the TRICARE Autism Care Demonstration guide.

APD and the iBudget waiver

Florida's Agency for Persons with Disabilities (APD) serves people with developmental disabilities, including autism and Down syndrome. Its iBudget waiver is a Medicaid home and community-based services waiver. The services Florida law lists for APD clients include "training, including behavioral analysis services," along with supported employment, supported living, respite and others (section 393.066).

To be enrolled in iBudget, a person must be eligible for Medicaid or SSI, meet the required level of care, and funding must be available.
Florida law gives priority to certain groups. One priority category (category 5) is for people who will graduate from high school within 12 months, so applying while your teen is still in school can matter.
Many people wait years. APD's August 2026 enrollment report says that of the offers made in fiscal year 2025-26, 6,248 went to people who had waited more than 10 years.

Self-pay

Paying privately is always an option, and the federal No Surprises Act gives self-pay patients the right to a Good Faith Estimate of expected charges.

What should we do before our teen turns 18?

Check your plan type and whether the Florida mandate applies. See fully insured vs self-funded plans.
Ask member services in writing: "Does ABA have an age limit under this plan? If my child is 18 and in high school, what proof do you need?"
Gather the earliest diagnosis record and keep it with your insurance papers.
Talk with your teen's BCBA about goals for the transition years: daily living, safety, work readiness and self-advocacy. Plans review progress at each reauthorization, so clear goals help.
Plan the legal side. At 18, your teen is a legal adult. See turning 18 in Florida for guardianship alternatives and health care decision options.
Contact APD early if your teen may need adult services.

How Hope Center can help

Hope Center works with older children and teens as well as young children, in homes, schools, the community and our centers, and we also offer mental health therapy. Our free benefits check asks your plan about age limits and what it needs once your teen turns 18. We work with Blue Cross Blue Shield (Florida Blue), Aetna, Cigna (Evernorth), UMR, Personify Health and TRICARE East, and self-pay with a sliding scale is available. See how we work with teens, insurance at Hope Center, or call 561-337-8865.

This guide is general information for Florida families, not medical, legal or financial advice for your child. Laws, plan rules and program amounts change; check with your plan, the agency named, or a Florida attorney before you act.

ABA Coverage After 18 in Florida: The High School and 'Diagnosed by 8' Rules