Impairment

A loss of, or difference in, a body function or structure. Impairments can lead to disability depending on their impact.

What it means

An impairment is a loss of, or difference in, a person's body function or structure. Impairments can be physical, sensory, cognitive, intellectual or psychosocial. For example, they might affect how a person moves, sees or hears, thinks or remembers, or experiences mental health.

An impairment is not automatically the same as disability. Whether, and how much, an impairment leads to disability depends on how it affects a person's life and how well the world around them is set up to include them. The NDIS is particularly interested in the functional impact of an impairment, meaning what a person can and cannot do in daily life, rather than simply the fact that an impairment exists.

In practice

Because the focus is on functional impact, two people with a similar diagnosis may have very different experiences and needs. What matters is how the impairment affects everyday activities, communication, learning, mobility, self-care and social participation.

This is why assessments often look at what a person needs help with in daily life, not just their medical label. Some impairments are permanent, while others may vary in how they affect a person from day to day. Understanding the practical effects helps identify the right supports, so a person can do the things that are important to them with as much independence as possible.

A real example

For example, Leon has a hearing impairment that affects how he follows conversations, especially in noisy places. On its own, the impairment is a difference in body function, but its impact on his daily life depends on the situation. With captioning, a quiet room, or an interpreter, Leon takes part fully in meetings. This shows how the functional effect of an impairment, not just its presence, shapes what support is useful.

Impairment — FAQs

What is an impairment?
An impairment is a loss of, or difference in, a person's body function or structure. It can be physical, sensory, cognitive, intellectual or psychosocial, affecting things like movement, senses, thinking or mental health. An impairment describes the underlying difference in how the body or mind works, which may or may not lead to disability depending on its effect on a person's life.
What is the difference between impairment and disability?
An impairment is a difference in body function or structure, while disability is about how that impairment affects a person's life, especially when combined with barriers in the world around them. The same impairment can have very different effects for different people. Disability emerges from the interaction between the impairment and a person's environment and circumstances.
What types of impairment are there?
Impairments can be physical, sensory, cognitive, intellectual or psychosocial. Physical impairments affect the body and movement, sensory impairments affect senses like sight or hearing, cognitive and intellectual impairments affect thinking, learning or memory, and psychosocial impairments relate to mental health. A person may experience one type or several at once, and each can affect daily life differently.
Why does the NDIS focus on functional impact?
The NDIS focuses on functional impact because what matters most for support is how an impairment affects everyday life, not just the diagnosis. Two people with the same condition can have very different needs. Looking at daily activities, communication, mobility, self-care and participation helps identify the practical support a person actually needs to live the life they want.
Is an impairment always permanent?
Not always. Some impairments are permanent, while others may change or vary in how they affect a person over time or from day to day. What tends to matter for support is the ongoing functional impact on a person's life. Assessments generally look at how an impairment affects daily activities rather than only whether it is permanent.

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