ICD-10 Code H70.811 – Postauricular fistula, right ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.811 – Postauricular fistula, right ear
What it is
H70.811 identifies a fistulous opening behind the right ear. It indicates an abnormal tract or channel in the postauricular area, documented as affecting the right side.
Clinical signs
Clinical features vary; refer to documentation. You may see a persistent opening, intermittent drainage, local irritation, or recurrent infection noted behind the right ear.
When to use this code
Use this code when the provider documents a postauricular fistula specifically on the right ear. Apply it for confirmed congenital or acquired fistulous tracts in that location when the right side is clearly identified.
If the note only says “postauricular fistula” without laterality, check documentation before coding. Code the documented condition, not a suspected abscess, cyst, or nonspecific ear drainage.
Do not use for
Do not use this code for left-sided or unspecified postauricular fistulae. Also avoid it when the record describes another ear lesion or infection without a fistula.
Coding tip
Verify laterality in the operative note, problem list, or assessment before assigning H70.811.