ICD-10 Code H81.21 – Vestibular neuronitis, right ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H81.21 – Vestibular neuronitis, right ear
What it is
Vestibular neuronitis, right ear is a diagnosis for inflammation or dysfunction of the right vestibular nerve causing acute balance disturbance. It is used when the right side is specifically documented.
Clinical signs
Typical findings include sudden vertigo, nausea, imbalance, and nystagmus, with hearing usually preserved. Clinical features vary; refer to documentation.
When to use this code
Use H81.21 when the provider documents vestibular neuronitis affecting the right ear or right vestibular nerve. Code it when the record supports an acute peripheral vestibular disorder and laterality is clearly stated. If laterality is not documented, check documentation.
Do not use for
Do not use this code for Ménière disease, benign paroxysmal positional vertigo, or dizziness without a documented vestibular neuritis diagnosis. Check documentation if the cause is unclear.
Coding tip
Always verify laterality in the note, because H81.21 is specific to the right ear.