ICD-10 Code H83.12 – Labyrinthine fistula, left ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H83.12 – Labyrinthine fistula, left ear
What it is
H83.12 identifies an abnormal opening between the inner ear and surrounding structures in the left ear. It indicates a left-sided labyrinthine fistula, which may allow fluid or pressure changes to affect hearing and balance.
Clinical signs
Typical findings include vertigo, hearing changes, and disequilibrium, but clinical features vary; refer to documentation. Diagnosis is usually supported by otologic evaluation and imaging or operative findings.
When to use this code
Use this code when the provider documents a labyrinthine fistula specifically in the left ear. It fits cases confirmed by exam, imaging, or surgery, and when laterality is clearly stated in the record.
Do not assume the diagnosis from nonspecific dizziness or hearing loss alone. If the note only mentions a suspected fistula, check documentation before coding.
Do not use for
Do not use H83.12 for right ear, bilateral, or unspecified labyrinthine fistula. Also avoid it when the record describes only vertigo, otitis media, or another ear disorder without fistula documentation.
Coding tip
Verify laterality and confirm that the provider documented a true labyrinthine fistula before assigning H83.12.