ICD-10 Code H95.113 – Chronic inflammation of postmastoidectomy cavity, bilateral ears (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H95.113 – Chronic inflammation of postmastoidectomy cavity, bilateral ears
What it is
This code identifies chronic inflammation in the surgical mastoid cavities on both sides after mastoidectomy. It indicates a persistent inflammatory condition in the post-surgical ear spaces.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe ongoing drainage, granulation tissue, irritation, or recurrent infection in the mastoid cavity after prior surgery.
When to use this code
Use H95.113 when the provider documents chronic inflammation affecting both postmastoidectomy cavities. It fits follow-up visits, ENT evaluations, or problem lists when the condition is active and specifically bilateral. If the note only mentions a history of mastoidectomy without current inflammation, do not assign this code.
Do not use for
Do not use this code for acute postoperative infection, nonspecific otitis externa, or a simple history of mastoid surgery. Check documentation if the inflammation is unilateral or if the cavity is not specified.
Coding tip
Confirm both laterality and the word “chronic” in the provider note before reporting H95.113.