ICD-10 Code H71.2 – Cholesteatoma of mastoid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H71.2 – Cholesteatoma of mastoid
What it is
H71.2 identifies a cholesteatoma located in the mastoid. This is an abnormal growth of keratinizing skin tissue in the middle ear or mastoid area that can erode nearby structures.
Clinical signs
Common findings include chronic ear drainage, hearing loss, and a retraction pocket or mass seen on otoscopic exam. Clinical features vary; refer to documentation.
When to use this code
Use H71.2 when the record clearly documents cholesteatoma involving the mastoid, whether diagnosed clinically, by imaging, or at surgery. Code it when the provider specifies mastoid involvement rather than a nonspecific middle ear cholesteatoma. Check documentation if the site is unclear.
Do not use for
Do not use this code for simple otitis media, ear discharge alone, or mastoiditis without cholesteatoma. If the note does not confirm mastoid involvement, choose the more specific documented diagnosis.
Coding tip
Verify the anatomic site in the operative note or assessment before assigning H71.2.