ICD-10 Code F80.81 – Childhood onset fluency disorder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F80.81 – Childhood onset fluency disorder
What it is
F80.81 identifies a childhood-onset fluency disorder, commonly called stuttering. It describes disrupted speech flow with repeated sounds, syllables, or words, or with prolonged sounds and blocks.
Clinical signs
Typical findings include frequent repetitions, sound prolongations, and involuntary pauses that interrupt normal speech fluency. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents childhood onset fluency disorder or stuttering as the diagnosis. It may also apply when the record clearly describes developmental fluency impairment affecting speech production. Check documentation if the note uses nonstandard wording.
Do not use for
Do not use this code for transient speech hesitation without a documented fluency disorder. Do not substitute it for language delay, articulation problems, or neurologic speech changes unless the provider specifically documents childhood onset fluency disorder.
Coding tip
Confirm the diagnosis is explicitly documented, because “speech problem” alone is not enough for F80.81.