ICD-10 Code F84.3 – Other Childhood Disintegrative Disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F84.3 – Other childhood disintegrative disorder
What it is
F84.3 identifies other childhood disintegrative disorder, a rare developmental condition marked by later loss of previously acquired skills. Use it when documentation clearly describes this specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions include regression in language, social interaction, play, or adaptive skills after a period of normal development.
When to use this code
Use F84.3 when the provider documents other childhood disintegrative disorder or equivalent wording. It may apply when a child had established developmental skills and then experienced significant regression not better described by another code.
Check the record for the provider’s diagnostic statement and any supporting developmental history. Do not assign the code based only on nonspecific behavioral concerns or delayed milestones.
Do not use for
Do not use this code for autism spectrum disorder, isolated speech delay, or general developmental delay. If the documentation is unclear, check documentation.
Coding tip
Code only when the chart shows true developmental regression and the provider names this disorder.