
Specific delays in development

Developmental reading disorder

Developmental reading disorder unspecified

Alexia
- Inability to read which may be the result of neurological impairment. In a less severe form, often referred to as dyslexia.

Developmental dyslexia

Other specific developmental reading disorder

Mathematics disorder

Other specific developmental learning difficulties

Developmental speech or language disorder

Expressive language disorder

Mixed receptive-expressive language disorder

Other developmental speech disorder
- Speech disorders involving the substitution, omission, distortion, or addition of phonemes.

Developmental coordination disorder
- loss of ability to perform familiar, purposeful movements in the absence of paralysis or other neural sensorimotor impairment.
- Inability to execute complex coordinated movements resulting from lesions in the motor area of the cortex but involving no sensory impairment or paralysis.

Mixed development disorder

Other specified delays in development

Unspecified delay in development
- As encompassed in federal legislation for educational assistance to handicapped children, includes disabilities originating before age 18 that constitute substantial barriers to normal functioning. Use a more specific term if possible.
- conditions characterized by a significant discrepancy between an individual's perceived level of intellect and their ability to acquire new language and other cognitive skills; may result from organic or psychological conditions.
- According to U.S. federal legislation, learning problems that are due to visual, hearing, or motor handicaps, mental retardation, emotional disturbance or environmental, cultural, or economic disadvantage. Compare LEARNING DISABILITIES.
- Delays in any or all areas including cognitive, social, language, sensory, and emotional development.