ICD-10 Code H70.213 – Acute petrositis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.213 – Acute petrositis, bilateral
What it is
H70.213 identifies an acute infection or inflammation of both petrous portions of the temporal bone. Use it when documentation clearly states bilateral acute petrositis.
Clinical signs
Clinical features vary; refer to documentation. Acute petrositis may present with ear pain, fever, otitis-related findings, or complications involving nearby cranial structures.
When to use this code
Use this code when the provider documents acute petrositis affecting both sides. It is appropriate for confirmed bilateral disease in the chart, whether diagnosed clinically or with imaging. If laterality is not stated, check documentation before coding.
Do not use for
Do not use it for chronic petrositis or for nonspecific mastoid or ear infections without petrous involvement. If the record does not confirm bilateral acute petrositis, check documentation.
Coding tip
Verify both acuity and laterality in the provider note before assigning H70.213.