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ICD-10-CM 2027

ICD-10 code for acute petrositis

H70.21

Acute petrositis

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Petrositis › acute”. Page updated September 29, 2026.

About coding acute petrositis

The ICD-10-CM code for acute petrositis is H70.21 (Acute petrositis).

Within H70.2 (petrositis), H70.21 is specifically for acute petrositis. Related codes cover unspecified petrositis (H70.20) and chronic petrositis (H70.22).

To report this condition, pick the subcode that matches the documentation: H70.211 (right ear), H70.212 (left ear), H70.213 (bilateral) and H70.219 (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.

Common questions about acute petrositis ICD-10 codes

What is the ICD-10 code for acute petrositis?

H70.21 — Acute petrositis (a header code; report a more specific subcode).

Is H70.21 billable?

No. H70.21 is a header code. Report one of its more specific subcodes instead.