ICD-10 Code H70.212 – Acute petrositis, left ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.212 – Acute petrositis, left ear
What it is
H70.212 identifies an acute infection and inflammation of the petrous part of the temporal bone on the left side. Use it when documentation specifically states acute petrositis, left ear.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe ear pain, persistent otitis-related symptoms, and possible involvement of nearby structures in severe cases.
When to use this code
Use this code when the provider documents acute petrositis affecting the left ear or left petrous temporal bone. It may appear in records tied to complicated ear infection, mastoid-region disease, or skull base infection. Code only when laterality and acuity are clearly stated.
Do not use for
Do not use it for unspecified petrositis, chronic petrositis, or ear infections without petrous bone involvement. Check documentation if the side is not identified or if the condition is described differently.
Coding tip
Verify both acuity and laterality in the note before assigning H70.212.