ICD-10 Code H70.812 – Postauricular Fistula, Left Ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.812 – Postauricular fistula, left ear
What it is
This code identifies an abnormal opening or tract behind the left ear. It is used when documentation specifies a postauricular fistula on the left side.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a visible draining opening, recurrent discharge, or localized irritation behind the left ear.
When to use this code
Use H70.812 when the provider documents a postauricular fistula limited to the left ear region. Code it from operative notes, specialist assessment, or imaging reports that clearly identify the left-sided fistula.
If the record only says “ear fistula” or does not specify laterality, check documentation before assigning this code. Make sure the condition is not being described as another ear disorder.
Do not use for
Do not use this code for nonspecific ear drainage, skin infection, or a fistula in another location. Check documentation if the side or exact diagnosis is unclear.
Coding tip
Always confirm laterality; H70.812 is specific to the left ear and should not be used for unspecified or right-sided documentation.