H71.21: Cholesteatoma of mastoid, right ear
H71.21 is the billable ICD-10-CM diagnosis code for Cholesteatoma of mastoid, right ear. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code H71.21?
H71.21 is the ICD-10-CM diagnosis code for Cholesteatoma of mastoid, right ear. It belongs to category H71 (Cholesteatoma of middle ear).
Is H71.21 a billable code?
Yes. H71.21 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does H71.21 belong to?
H71.21 is part of ICD-10-CM category H71 — Cholesteatoma of middle ear, which has 40 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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