ICD-10 Code H70.2 – Petrositis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.2 – Petrositis
What it is
Petrositis is inflammation or infection of the petrous part of the temporal bone, usually as a complication of middle ear disease. Use this code when documentation specifically identifies petrositis.
Clinical signs
Clinical features may include persistent ear pain, headache, fever, and signs of otitis media or mastoid involvement. Cranial nerve findings can occur; if details are unclear, check documentation.
When to use this code
Use H70.2 when the provider documents petrositis as the diagnosed condition, including petrous apicitis or petrous bone infection. It may appear with chronic or complicated ear infection notes. Code the documented condition, not a suspected complication.
Do not use for
Do not use this code for uncomplicated otitis media, mastoiditis, or nonspecific ear pain without petrous bone involvement. If the record does not clearly identify petrositis, check documentation.
Coding tip
Confirm that the provider links the infection or inflammation to the petrous bone before assigning H70.2.