ICD-10 Code H70.201 – Unspecified petrositis, right ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H70.201 – Unspecified petrositis, right ear
What it is
H70.201 identifies petrositis affecting the right ear when the documentation does not specify the type. Petrositis is inflammation or infection involving the petrous part of the temporal bone.
Clinical signs
Clinical features vary; refer to documentation. Typical notes may include ear pain, infection-related findings, or complications involving the temporal bone region, but you should code only what is documented.
When to use this code
Use H70.201 when the provider documents petrositis in the right ear and does not name a more specific form. It also fits when laterality is clearly right, but the record says “unspecified” or lacks further detail. Check documentation if the diagnosis is uncertain.
Do not use for
Do not use this code for left-sided or bilateral petrositis, or when the chart specifies a more detailed petrositis type. Do not use it for general otitis or mastoiditis unless petrositis is documented.
Coding tip
Confirm laterality and whether the provider truly documented petrositis before assigning H70.201.