Overview
A developmental disability is a significant, long-term condition that affects how a person learns, communicates, moves, or cares for themselves, and that began before the age of 22. These conditions are typically lifelong, though the support someone needs may change at different stages of life.
Developmental disabilities are not a single condition. They are a broad category that includes many different diagnoses. What they have in common is that they affect daily functioning in meaningful ways and began during childhood or adolescence.
Common Examples
Developmental disabilities include, but are not limited to:
- Intellectual disability (formerly referred to as mental retardation)
- Autism spectrum disorder (ASD)
- Cerebral palsy
- Down syndrome
- Fragile X syndrome
- Fetal alcohol spectrum disorders (FASD)
- Epilepsy and other seizure disorders with associated functional limitations
- Traumatic brain injury occurring before age 22
A specific diagnosis alone doesn’t automatically qualify someone for services, what matters is how the condition affects the person’s ability to function independently in daily life.
What It Means for Families
If your family member has a diagnosis that falls into this category, they may be eligible for a range of publicly funded services through agencies like Washington State’s Developmental Disabilities Administration (DDA) or Division of Vocational Rehabilitation (DVR). These services can include employment support, respite care, community inclusion, life skills coaching, and more.
It’s also worth knowing that a person doesn’t have to have a single tidy diagnosis to qualify. Some individuals are evaluated based on the overall functional impact of their condition rather than a specific label.
What It Doesn’t Mean
A developmental disability is not a mental health condition (though some individuals may have both). It is not something that can be “grown out of.” And it is not a limit on what a person can accomplish — with the right support, individuals with developmental disabilities build careers, form meaningful relationships, and live active lives in their communities.
A Note on Language
Language in this space continues to evolve. You’ll hear terms like “intellectual and developmental disabilities” (IDD), “unique abilities,” or “individuals with disabilities” used by different organizations. At Columbia Ability Alliance, we use person-first language (putting the person before the diagnosis) while also respecting that some individuals prefer identity-first language. If you’re ever unsure, following the lead of the person you’re supporting is always the right call.
Want to Know More?
If you’re wondering whether your family member’s specific condition qualifies them for services in Washington State, the next step is reviewing DDA eligibility — or simply calling CAA’s team and talking through your situation.
Learn How to Know If Your Loved One Qualifies → | Contact Columbia Ability Alliance
FAQ
Does my family member need a formal diagnosis to access services?
Generally yes — a diagnosis or documented functional evaluation is typically required to access publicly funded services through DDA or DVR. If you don’t have one yet, your family member’s doctor or school can be a good starting point.
What’s the difference between a developmental disability and a learning disability?
Learning disabilities (like dyslexia or ADHD) affect how someone processes information but typically don’t affect overall daily functioning in the same broad way. They are generally not classified as developmental disabilities for the purpose of DDA eligibility, though DVR services may still be available.
My family member was diagnosed as an adult — do they still qualify?
For DDA eligibility specifically, the condition must have originated before age 22. If a diagnosis wasn’t made until adulthood but the condition clearly began earlier, families can work with their physician and DDA to document that history.
