ICD-10 Code H70.819 – Postauricular fistula, unspecified ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.819 – Postauricular fistula, unspecified ear
What it is
This code identifies a fistula or abnormal opening behind the ear, with the side not specified. Use it when the record documents a postauricular fistula but does not name the affected ear.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include a persistent draining opening, localized swelling, or recurrent irritation behind the auricle.
When to use this code
Use H70.819 when the clinician documents a postauricular fistula and laterality is not stated. It also fits cases where the note clearly describes a postauricular fistula without further detail. If the record identifies the ear, choose the more specific code instead.
Do not use for
Do not use this code for general ear infections, abscesses, or skin lesions without a documented fistula. If the condition is congenital, traumatic, or otherwise specified, check documentation for a more accurate code.
Coding tip
Always verify whether the affected ear is documented before assigning the unspecified code.