ICD-10 Code F98.4 – Stereotyped Movement Disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F98.4 – Stereotyped movement disorders
What it is
F98.4 identifies stereotyped movement disorders, which are repetitive, seemingly purposeless movements or behaviors. Use this code when the record documents a stereotyped pattern rather than another neurologic movement disorder.
Clinical signs
Typical findings include repeated body movements such as hand flapping, rocking, head banging, or similar patterned actions. Clinical features vary; refer to documentation, and confirm that the behavior is persistent and not better explained by another condition.
When to use this code
Use F98.4 when the clinician specifically documents stereotyped movement disorder or stereotyped movements as the diagnosis. It may also fit when the chart describes repetitive, nonfunctional movements causing concern and no more specific disorder is named. Check documentation if the cause is unclear.
Do not use for
Do not use this code for tics, seizures, tremor, or other defined neurologic movement disorders. If the note points to a different developmental, psychiatric, or neurologic diagnosis, code that condition instead.
Coding tip
Code F98.4 only when the provider documents stereotyped movement disorder explicitly or clearly describes it without a better alternative.