ICD-10 Code H95.11 – Chronic inflammation of postmastoidectomy cavity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H95.11 – Chronic inflammation of postmastoidectomy cavity
What it is
This code identifies ongoing inflammation in the mastoidectomy cavity after ear surgery. Use it when the postoperative cavity remains chronically irritated or inflamed, rather than healing normally.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include persistent drainage, irritation, debris, or granulation tissue in the postmastoidectomy cavity.
When to use this code
Use H95.11 when the provider documents chronic inflammation of the postmastoidectomy cavity as the active condition. It may apply in follow-up visits for an established postoperative cavity problem. If the note only describes routine postoperative healing or an acute infection, check documentation before coding this diagnosis.
Do not use for
Do not use this code for acute postoperative infection, simple ear pain, or unspecified mastoid cavity problems. If the record does not clearly state chronic inflammation, check documentation.
Coding tip
Assign this code only when the provider specifically documents chronic inflammation of the postmastoidectomy cavity.