Other childhood disintegrative disorder

This code represents a rare pervasive developmental disorder characterized by a significant regression in previously acquired skills across multiple developmental domains (e.g., social, communication, motor, bowel/bladder control) after at least two years of normal development. The onset typically occurs between ages 2 and 10, and the regression is often profound and progressive.

Assign this code when documentation clearly indicates a child experienced a marked loss of previously acquired developmental milestones in multiple areas following a period of normal development, and the presentation does not meet criteria for autistic disorder, Asperger's syndrome, or Rett's syndrome. This diagnosis requires a thorough developmental history confirming the regression.

• Ensure documentation specifies the age of onset and the specific domains of skill loss.
• Carefully review the "Excludes1" notes to avoid incorrect co-coding with other pervasive developmental disorders.
• This diagnosis is distinct from a general developmental delay; the key feature is the loss of previously acquired skills.