ICD-10-CM 2027
ICD-10 code for petrositis
From the official ICD-10-CM alphabetic index entry “Petrositis”. Page updated September 29, 2026.
About coding petrositis
The ICD-10-CM code for petrositis is H70.20 (Unspecified petrositis). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H70.20.
Within H70.2, choose H70.20 (Unspecified petrositis) only when documentation doesn't support a more specific option: acute petrositis (H70.21) and chronic petrositis (H70.22).
To report this condition, pick the subcode that matches the documentation: H70.201 (right ear), H70.202 (left ear), H70.203 (bilateral) and H70.209 (unspecified ear).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific petrositis codes (official index)
Common questions about petrositis ICD-10 codes
What is the ICD-10 code for petrositis?
- H70.20 — Unspecified petrositis (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H70.21, H70.22.
What is the ICD-10 code for acute petrositis?
- H70.21 — Acute petrositis (header code; choose a more specific subcode).
What is the ICD-10 code for chronic petrositis?
- H70.22 — Chronic petrositis (header code; choose a more specific subcode).
Is H70.20 billable?
- No. H70.20 is a header code. Report one of its more specific subcodes instead.