Arizona DDD Eligibility and Application Process

What DDD Is and Why It Matters for Transition

The Division of Developmental Disabilities (DDD), part of Arizona's Department of Economic Security, is the administrative gateway for long-term developmental disability services in the state. When your child exits the school system, the entitlement to FAPE ends — and DDD becomes the primary entity coordinating ongoing support.

DDD does not directly fund most services. Instead, it determines eligibility, assigns a support coordinator, and connects the individual to ALTCS Medicaid-funded Home and Community-Based Services. But without DDD eligibility, those DDD-coordinated downstream services are not accessible through this pathway.

The Five Qualifying Diagnoses

To qualify for DDD services after age six, an individual must have at least one of five developmental disabilities that manifested before age 18 and is expected to continue indefinitely:

1. Autism Spectrum Disorder
2. Cerebral Palsy
3. Cognitive/Intellectual Disability
4. Epilepsy
5. Down Syndrome

The applicant must also demonstrate substantial functional limitations in at least three of seven major life areas: self-care, receptive and expressive language, learning, mobility, self-direction, capacity for independent living, and economic self-sufficiency.

Having a qualifying diagnosis alone is not sufficient — the functional limitation threshold is what determines eligibility. A student with well-managed epilepsy who functions independently in all seven areas may not qualify, while a student with an intellectual disability and significant limitations in self-care, learning, and self-direction likely will.

The Application Packet

The primary application materials are the DDD Eligibility Packet (Forms DDD-1972A and DDD-2069A), downloadable from the DES website. The packet requires:

• Proof of Arizona residency
• Diagnostic documentation from a qualified professional (neuropsychological evaluation, medical records, or school psychological assessment)
• Functional assessment information showing limitations in the required life areas
• The applicant's or guardian's signature (voluntary application — DDD services are not mandatory)

For students transitioning from school, the IEP and associated evaluations often provide most of the functional documentation needed. The Summary of Performance (SOP) issued at school exit is also valuable supporting evidence.

DDD processes applications through its Eligibility Unit. Once approved, the individual is assigned a support coordinator who manages their case and develops an Individual Support Plan (ISP).

What Support Coordination Includes

The DDD support coordinator is the single point of contact for navigating the developmental disability service system. Their responsibilities include:

• Developing the ISP with the member and their family
• Connecting the member to contracted service providers (attendant care, habilitation, day programs, respite)
• Coordinating with the managed care plan (Mercy Care or UnitedHealthcare Community Plan) for physical and behavioral health needs
• Conducting periodic reviews — typically every 90 to 180 days

However, support coordinators manage large caseloads, and check-ins outside of scheduled reviews are often brief. They also cannot advise on matters outside their agency's scope — they will not help with SSI applications, ALTCS financial eligibility, or school-based IEP disputes.

Timing the Application

For families of students with IEPs, the DDD application process should begin well before the student exits school. If the student was enrolled in DDD as a child, an adult redetermination of eligibility happens at age 18. If they were not previously enrolled, the application can be submitted at any time — but earlier is better, because processing takes time and the student should have a support coordinator in place before FAPE ends.

The Arizona IEP Transition to Adulthood Guide walks through the full DDD application timeline alongside the parallel ALTCS and VR applications, so families can manage all three tracks without missing deadlines.

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