H70.012: Subperiosteal abscess of mastoid, left ear
H70.012 is the billable ICD-10-CM diagnosis code for Subperiosteal abscess of mastoid, left 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 H70.012?
H70.012 is the ICD-10-CM diagnosis code for Subperiosteal abscess of mastoid, left ear. It belongs to category H70 (Mastoiditis and related conditions).
Is H70.012 a billable code?
Yes. H70.012 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 H70.012 belong to?
H70.012 is part of ICD-10-CM category H70 — Mastoiditis and related conditions, which has 80 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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