Childhood onset fluency disorder

This code represents a neurodevelopmental disorder characterized by significant and persistent disruptions in the normal fluency and timing of speech, typically beginning in childhood. These disruptions manifest as repetitions of sounds or syllables, prolongations of sounds, interjections, broken words, blocks, or circumlocutions.

Assign this code when documentation clearly indicates a diagnosis of childhood-onset fluency disorder, commonly known as stuttering, where the onset occurred during the developmental period. Supporting documentation should detail the specific speech dysfluencies and confirm their chronic nature and impact on communication.

• Differentiate from adult-onset fluency disorder (F98.5), which has a later onset.
• Do not use for fluency disorders secondary to other medical conditions; refer to the Excludes1 notes for specific guidance.
• Ensure the provider's documentation explicitly states "childhood onset" or provides a history consistent with onset during childhood.