Do I need a Medicaid waiver to get ABA for my child?

Usually not. If your child is under 21 and enrolled in Medicaid, coverage of medically necessary services to correct or ameliorate a condition is required under EPSDT, whether or not the state covers the service for adults. Waivers are a separate, capped program that generally adds services Medicaid does not otherwise cover, such as respite. Several autism-specific waivers do not pay for ABA at all.

Why is there a waiting list for a waiver but not for EPSDT?

A 1915(c) waiver lets a state cap enrollment and target a specific population, which is why waivers have registries and waiting lists. EPSDT is an entitlement tied to Medicaid eligibility, so it has no enrollment cap. States may use prior authorization and medical necessity review under EPSDT, but CMS's September 2024 guidance says they may not apply hard limits that can never be exceeded.

Does my state's autism insurance mandate apply to my employer plan?

Only if the plan is fully insured. State insurance mandates regulate insurance contracts. Under ERISA's deemer clause, a state cannot deem a self-funded employee benefit plan to be an insurance company, so self-funded employer plans are not subject to state mandated-benefit laws. Ask your employer's benefits office whether the plan is self-funded or fully insured before reading your state's mandate.

Can a state cap the number of ABA hours it will pay for?

For children under 21, CMS distinguishes hard limits from soft limits. A hard limit that can never be exceeded is not permitted for a service covered under EPSDT. A soft limit that can be exceeded with prior authorization and a medical necessity review is permitted.

Autism Medicaid Waivers and Insurance Coverage by State

EPSDT, state plan coverage, 1915(c) waivers and state insurance mandates are four different legal systems. Which one pays for your child's ABA depends on which door you are standing in front of.

If your child is under 21 and enrolled in Medicaid, you probably do not need a waiver to get applied behavior analysis. Autism waivers have registries and waiting lists. The federal EPSDT entitlement does not. And of the four autism-specific waivers documented below, three do not list ABA as a covered waiver service at all.

Four separate legal systems get called “autism coverage.” They have different rules, different timelines, and different answers to the question “can they say no.” This guide separates them.

The four systems

EPSDT — a federal entitlement for Medicaid-enrolled children under 21. No enrollment cap, no waiting list.
State plan coverage — the written description of how a state covers a service in its Medicaid state plan.
1915(c) HCBS waivers — capped, targeted programs with waiting lists and an institutional level-of-care test.
State insurance mandates — state laws that apply to commercial insurance contracts, not to Medicaid and not to self-funded employer plans.

They are routinely described interchangeably. They are not interchangeable.

EPSDT is the entitlement

Early and Periodic Screening, Diagnostic and Treatment is required by sections 1905(a)(4)(B) and 1905(r) of the Social Security Act and implemented at 42 CFR Part 441, Subpart B. Section 441.50 describes the requirement as “providing early and periodic screening and diagnosis of eligible Medicaid beneficiaries under age 21 to ascertain physical and mental defects, and providing treatment to correct or ameliorate defects and chronic conditions found.”

CMS’s July 7, 2014 informational bulletin on Medicaid coverage of services to children with autism states that “States are required to arrange for and cover for individuals eligible for the EPSDT benefit any Medicaid coverable service listed in section 1905(a) of the Act that is determined to be medically necessary to correct or ameliorate any physical or behavioral conditions,” and that “If a service, supply or equipment that has been determined to be medically necessary for a child is not listed as covered (for adults) in a state’s Medicaid State Plan, the state will nonetheless need to arrange for and cover it for the child.”

The same bulletin makes a point that is often lost: CMS does not require ABA. It notes that “While much of the current national discussion focuses on one particular treatment modality called Applied Behavioral Analysis (ABA), there are other recognized and emerging treatment modalities for children with ASD.” CMS’s August 2026 Medicaid and CHIP ABA toolkit repeats this: “CMS is not endorsing or requiring any particular treatment modality for ASD.”

Two limits on state discretion matter here. CMS’s September 26, 2024 State Health Official letter (SHO 24-005) states that “states are not permitted to apply these kinds of limits to any service covered under EPSDT,” referring to hard limits on amount, duration and scope that can never be exceeded. It also states that “a service need not cure a condition in order to be covered under EPSDT as a medically necessary service. Services that maintain or improve a child’s current health condition are also covered.” States may still use prior authorization and medical necessity review.

State plan coverage is the plumbing

EPSDT says a state must cover the service. The state plan says how. ABA is not named in section 1905(a), so states attach it to an existing benefit category. The CMS toolkit lays out the options, including:

Other Licensed Practitioner services, section 1905(a)(6), 42 CFR 440.60 — used by Louisiana to cover Licensed Behavior Analysts.
Preventive services, section 1905(a)(13), 42 CFR 440.130(c) — used by California, which covers ABA within its Behavioral Health Treatment benefit under both preventive services and EPSDT authority.
Rehabilitative services, 42 CFR 440.130(d) — the toolkit notes this benefit “requires the services provided to be restorative in nature” and “Cannot be used to cover habilitative services such as services that help a person acquire skills,” which is a real constraint for early intervention.

This is why the same child can get ABA in two states under two different benefit categories with two different provider rules.

Waivers are capped, and often do not buy ABA

A 1915(c) home and community-based services waiver lets a state waive statewideness, comparability and income rules to serve a targeted group who “but for the provision of those services, would require the level of institutional care.” That flexibility comes with an institutional level-of-care test, enrollment caps and waiting lists.

The CMS toolkit is blunt about the relationship: “Section 1915(c) services do not replace a state’s responsibility to meet EPSDT requirements.” It adds that “Many states historically offered ABA or behavioral interventions via 1915(c) waivers, especially for individuals with intellectual and developmental disabilities (IDD). However, CMS’s 2014 CMCS Informational Bulletin (CIB) and subsequent Frequently Asked Questions clarified that EPSDT-eligible children should receive services to address ASD and associated conditions under Section 1905(a) authority through the state plan.”

Missouri shows what that shift looks like in practice. The Missouri Department of Mental Health states that the “DDD Autism Waiver expired June 30, 2017. The target population of the Autism Waiver will now receive Applied Behavior Analysis services through Medicaid state plan.”

Autism-specific waivers verified from state agency sources

State	Waiver	Ages	Level of care	Does the waiver itself list ABA?	Access
Maryland	Autism Waiver, operated by the State Department of Education	1 through the end of the school year in which the child turns 21	ICF-IID	No. The nine listed services are adult life planning, environmental accessibility adaptations, family consultation, intensive individual support services, residential habilitation, respite, therapeutic integration, service coordination and Medical Assistance benefits	Registry and waiting list
Massachusetts	DDS Children’s Autism Waiver	Birth through age 9	ICF/ID	Yes. Expanded Habilitation, Education in-home services expressly include “Applied Behavioral Analysis (ABA) and Floor Time”	Limited open request periods; program materials cap participation at 300 children at any one time
Pennsylvania	Adult Autism Waiver	21 and older	ICF	Not named. The program page lists supports including day services, employment and career planning, residential options, respite, behavioral specialist and skill development services, and therapies	Registration through the county MH/ID program office
Kansas	HCBS Autism (AU) waiver	0 through 5	Level-of-care eligibility score	No. Listed services are family adjustment counseling, parent support and training, respite, and financial management services for self-direction	Proposed Recipient List with a numbered position; services limited to three years, with a possible fourth on review

Read that table again. Three of the four autism-specific waivers do not list ABA as a covered waiver service. They add wraparound supports — respite, family training, residential — on top of whatever ABA the child gets through EPSDT and the state plan. Maryland additionally requires enrollment in early intervention or special education — for school-age children, an IEP with “15 hours or more of special education and related services, and/or 1:1 adult supports per week” — plus income at or below 300% of SSI and countable assets under $2,000 or $2,500.

One forward-looking change: the toolkit notes that section 71121 of Public Law 119-21 added paragraph (11) to section 1915(c), creating a new waiver option effective July 1, 2028 that “allows states to provide HCBS to individuals whose needs may not meet an institutional level of care.”

State insurance mandates are a different law entirely

State autism mandates sit in the insurance code, not the Medicaid code. They bind insurance contracts issued in the state. Texas is a clear example. Texas Insurance Code section 1355.015 requires a health benefit plan to cover treatment for an enrollee “diagnosed with autism spectrum disorder from the date of diagnosis, only if the diagnosis was in place prior to the child’s 10th birthday,” lists applied behavior analysis among “generally recognized services,” and then provides that “The health benefit plan is not required to provide coverage under Subsection (b) for benefits for an enrollee 10 years of age or older for applied behavior analysis in an amount that exceeds $36,000 per year.”

Two structural facts determine whether that statute reaches you at all:

Self-funded plans are outside it. The Department of Labor’s guide to ERISA and state regulation explains that under the deemer clause “a State law that ‘purports to regulate insurance’ cannot deem an employee benefit plan to be an insurance company,” while plans that purchase insurance “are, as a practical matter, indirectly affected by State insurance laws.” Fully insured plan: state mandate applies. Self-funded plan: it does not.

Marketplace and small group plans run through essential health benefits. CMS notes that the ACA requires non-grandfathered individual and small group coverage to cover essential health benefits, that “HHS regulations (45 CFR 156.100, et seq.) define EHB based on State-specific EHB-benchmark plans,” and that the ten categories include “mental health and substance use disorder services including behavioral health treatment.” Because the benchmark is state-specific, the floor differs by state.

The CMS toolkit ties this back to Medicaid, attributing part of the growth in Medicaid ABA spending — from roughly $1.94 billion in 2021 to $10.1 billion in 2025, a 421 percent increase — in part to “ABA being a mandated service for fully insured, state-regulated health plans,” the creation of ABA-specific CPT codes, and the 2014 CMS guidance.

What we could not verify

A complete state-by-state list of autism waivers. We found no current official federal or state source enumerating every autism-specific 1915(c) waiver. The table above includes only states whose own agency pages we opened and read. Absence from the table is not evidence that a state lacks a waiver.
South Carolina. The SC DDSN waiver page lists three waivers — ID/RD, Community Supports and HASCI. It describes no autism-specific or pervasive developmental disorder waiver, and we could not verify one.
Michigan’s mandate statute. The Michigan Legislature site returned a CAPTCHA rather than the text of MCL 500.3359, so we left Michigan’s dollar caps out entirely rather than quote them from memory or a secondary site.
Massachusetts age cutoff. The current DDS program overview page says birth through age 9; an earlier program description on the same domain says birth through age 8. We cite the current page and flag the conflict.
Waiting list lengths. No state page we opened published a current number of people waiting or a typical wait time.