ICD-10 Code H95.121 – Granulation of postmastoidectomy cavity, right ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H95.121 – Granulation of postmastoidectomy cavity, right ear
What it is
This code identifies granulation tissue developing in the mastoidectomy cavity on the right side after surgery. Use it when the record specifically documents a right postmastoidectomy cavity with granulation.
Clinical signs
Findings may include persistent granulation tissue seen on otoscopic examination, sometimes with drainage or localized irritation. Clinical features vary; refer to documentation.
When to use this code
Use H95.121 when the provider documents granulation in a right mastoidectomy cavity after prior mastoid surgery. It fits postoperative follow-up notes, ENT evaluations, or problem lists that clearly identify the right side. Check documentation if the record only states mastoid cavity changes without granulation.
Do not use for
Do not use this code for granulation in the left ear, bilateral disease, or nonspecific external ear inflammation. It also should not be used when granulation is mentioned outside a postmastoidectomy cavity.
Coding tip
Capture laterality exactly; if the note does not specify right ear, verify the documentation before assigning H95.121.