Chronic mastoiditis

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

H70.10 Chronic mastoiditis, unspecified ear
H70.11 Chronic mastoiditis, right ear
H70.12 Chronic mastoiditis, left ear
H70.13 Chronic mastoiditis, bilateral

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2012 Added to the draft code set draft Chronic mastoiditis

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Endomastoiditis
Fistula > aural
Fistula > mastoid
Caries > mastoid process
Necrosis, necrotic > mastoid
Sclerosis, sclerotic > mastoid
Infection, infected, infective > mastoid
Mastoiditis > chronic

Codes in the same group

Code	Description	Status
H70.0	Acute mastoiditis	Not billable
H70.2	Petrositis	Not billable
H70.8	Other mastoiditis and related conditions	Not billable
H70.9	Unspecified mastoiditis	Not billable