The 13 disability categories under IDEA

The 13 disability categories come from the Individuals with Disabilities Education Act (IDEA). Their definitions sit in federal regulation at 34 CFR 300.8. When the school decides if your child is eligible for special education, the team asks two things. Does your child fit one of these categories? And because of it, do they need teaching that's set up differently for them?

A lot of parents and caregivers hear the category name for the first time at the eligibility meeting. Sometimes it's a word they never expected. That can sting. Knowing the definitions ahead of time makes that moment a lot less jarring.

How eligibility works: the two-part test

Under IDEA, a "child with a disability" is a child who has one of the listed disabilities and who, because of it, needs special education and related services. So eligibility has two parts, and your child has to meet both:

1. Your child meets the definition of at least one of the 13 disability categories (or developmental delay, if your state uses it).
2. Because of that disability, your child needs specially designed instruction, meaning teaching adapted in content, method or delivery.

Most of the definitions also say the disability "adversely affects a child's educational performance." In plain words: it gets in the way of how your child does at school. IDEA doesn't define educational performance, though. Some teams read it narrowly, as if only grades count.

Your child's struggles may not show up on a report card. If your child has a hard time talking with friends, if big feelings derail the school day, if getting dressed for gym or packing up at the end of the day takes an adult's help, that still counts as part of school. Say that at the table. Ask how the team is weighing it.

There's one more rule. The team can't find a child eligible if the main reason for the struggle is a lack of good teaching in reading or math, or that they're still learning English (34 CFR 300.306). I walk through the meeting itself in the eligibility meeting guide.

The 13 disability categories, one by one

Schools and families also call these the 13 categories of special education. Each summary below starts with what the federal definition says. Then it says what that means in everyday terms. Your state may add its own details. Districts also use different tests and checklists. So your school's paperwork may look a little different from what you see here. You don't need to memorize these special education categories. Just read the one or two that come up for your child.

1. Autism

A developmental disability that significantly affects verbal and nonverbal communication and social interaction, is generally evident before age 3, and adversely affects educational performance. In plain words: it changes how your child talks, connects with people and takes in the world. Repeating actions, getting upset by changes in routine and strong reactions to sounds, textures or light are often part of the picture. A child whose signs show up after age 3 can still qualify.

2. Deaf-blindness

Hearing and vision impairments together. The two combined create such severe communication, developmental and educational needs that a program built only for deaf children or only for blind children can't meet them. Put simply, your child needs a plan built around both senses at once. It starts with how they'll talk with teachers and friends every day.

3. Deafness

A hearing impairment so severe that the child can't process language through hearing, with or without amplification (like hearing aids), and that adversely affects educational performance. Put simply, your child can't take in spoken words by ear, even with help.

4. Emotional disturbance

One or more of these, over a long period of time and to a marked degree, that adversely affect educational performance:

• Trouble learning that can't be explained by intellectual, sensory or health factors.
• Trouble making or keeping friendships and relationships with teachers.
• Behavior or feelings that don't fit normal situations.
• A general, pervasive mood of unhappiness or depression.
• A tendency to develop physical symptoms or fears tied to personal or school problems.

The definition includes schizophrenia. It leaves out children who are "socially maladjusted" unless they also meet the definition. Illinois calls this category emotional disability. The name can be hard to hear. It describes needs at school, not who your child is. In plain words: big feelings or behavior get in the way of learning, and they have for a long time.

5. Hearing impairment

A hearing loss that is permanent or comes and goes, that adversely affects educational performance, but isn't severe enough to meet the definition of deafness. Your child hears some speech. But they miss enough that it gets in the way at school.

6. Intellectual disability

Significantly below-average general intellectual functioning, together with deficits in adaptive behavior. Adaptive behavior means the everyday skills of communication, self-care and getting along with others. It has to appear during the developmental period (childhood) and adversely affect educational performance. Both parts count. A test score alone isn't enough. In plain words: your child learns more slowly and needs help with daily skills, too.

7. Multiple disabilities

Two or more impairments that occur together, such as an intellectual disability with blindness or with an orthopedic impairment. The mix creates needs that a program for just one of them can't meet. Deaf-blindness has its own category and isn't counted here. Put simply, two needs together make a bigger need than either one alone.

8. Orthopedic impairment

A severe orthopedic impairment (a problem with bones, joints or muscles) that adversely affects educational performance. It includes impairments caused by a congenital anomaly (something present at birth), by disease (such as poliomyelitis or bone tuberculosis) and by other causes, such as cerebral palsy, amputations, and fractures or burns that cause contractures. In plain words: a body problem makes it hard to move around or do tasks at school.

9. Other health impairment

Limited strength, vitality or alertness caused by a chronic or acute health problem, adversely affecting educational performance. That includes heightened alertness to the environment that leaves a child less alert to schoolwork. In plain words: a health condition drains your child's energy or focus enough to affect learning.

The regulation names examples including ADHD, asthma, diabetes, epilepsy, a heart condition, hemophilia, lead poisoning, leukemia, nephritis, rheumatic fever, sickle cell anemia and Tourette syndrome. A lot of children with ADHD who have IEPs qualify here.

10. Specific learning disability

A disorder in one or more of the basic psychological processes involved in understanding or using spoken or written language. You might see it as trouble listening, thinking, speaking, reading, writing, spelling or doing math. The definition names dyslexia, perceptual disabilities, brain injury, minimal brain dysfunction and developmental aphasia. In plain words: reading, writing or math is much harder for your child than you'd expect. And it isn't because of a vision, hearing or thinking problem.

It leaves out learning problems that are mainly caused by visual, hearing or motor disabilities, intellectual disability, emotional disturbance, or environmental, cultural or economic disadvantage. To identify SLD, federal rules bar states from requiring a gap between IQ and achievement scores. States also have to allow a process based on how the child responds to extra help, often called RTI (34 CFR 300.307).

11. Speech or language impairment

A communication disorder, such as stuttering, impaired articulation, a language impairment or a voice impairment, that adversely affects educational performance. As a speech-language pathologist, this is the category I know from the inside. Put simply, your child has trouble with talking or understanding. It might be how sounds come out. It might be words, sentences and ideas. That can affect reading and class work long before anyone calls it a reading problem.

12. Traumatic brain injury

An injury to the brain caused by an outside physical force, after birth. It leads to full or partial loss of function, social and emotional problems, or both, and it adversely affects educational performance. It covers open or closed head injuries that affect areas such as thinking, language, memory, attention, reasoning, problem-solving, senses and movement, behavior and speech. It doesn't cover brain injuries that are present at birth, that get worse over time from a disease, or that are caused by birth trauma. In plain words: an injury from outside the body changed how your child thinks, learns or acts.

13. Visual impairment including blindness

An impairment in vision that, even with correction (like glasses), adversely affects educational performance. It includes both partial sight and blindness. Put simply, your child can't see well enough for school, even with glasses. If your child is blind or visually impaired, the IEP team has to plan for Braille instruction unless an evaluation shows Braille isn't right for your child (34 CFR 300.324).

Developmental delay: the optional category

IDEA lets states use developmental delay as an eligibility category for children ages 3 through 9, or for any part of that age range (34 CFR 300.8(b)). It covers young kids who are behind in how they move, think, talk, get along with others or handle daily tasks. They also need special education because of it. That way a team can help a young child without picking a narrower label too early.

The age range differs by state. Virginia uses developmental delay for children who are 2 by September 30 through age 6 (8VAC20-81-10). Illinois uses it for children 3 through 9, and the Illinois State Board of Education describes 14 categories once developmental delay is counted (ISBE parent guide). Before your child ages out of it, the team will need to look at whether another category fits. That's a good time to ask questions. What's changed since the last evaluation? What new testing does the team plan to do?

Qualifying under more than one category

Your child can meet the criteria for more than one category. Schools often record a primary disability. That's the one with the biggest effect on learning. Others get listed as secondary. Multiple disabilities is a separate category with its own rules. Two diagnoses don't automatically put your child there.

The label matters less than you might fear. IDEA doesn't require schools to sort children by disability, as long as each child who qualifies gets what they need (34 CFR 300.111(d)). The IEP has to address all of your child's needs. That's true even if they aren't typical of the category. Say your child qualifies under speech or language impairment. They can still get behavior supports or occupational therapy if the evaluation shows those needs.

A medical diagnosis is not the same as eligibility

A doctor's diagnosis of autism, ADHD or dyslexia is useful, and the team should consider it. But eligibility is a school decision. The team uses its own evaluation and the IDEA definitions. A child with a diagnosis may not qualify if they don't need specially designed instruction. A child without a diagnosis can qualify if the evaluation supports it. Neither side is wrong here. They're answering different questions. I explain the two systems in school-based vs. medical-model services.

If the team says your child isn't eligible

You'll get prior written notice explaining the decision and the data behind it. Read it carefully. If you disagree with the evaluation, you can ask for an independent educational evaluation at public expense. Your child may also qualify for a 504 plan. That plan covers students whose disability substantially limits a major life activity. See IEP vs. 504 plan. A "not eligible" decision isn't permanent. The door isn't closed. If your child's grades drop, if a teacher raises new concerns or if you get a new outside evaluation, you can ask in writing for the school to test again. My post on what to do when your child isn't found eligible goes through the next steps.