ICD-10-CM · Chapter 8 · H60-H95
H70 Mastoiditis and related conditions
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| H70..0 | Acute mastoiditis | No |
| H70..00 | Acute mastoiditis without complications | No |
| H70..001 | Acute mastoiditis without complications, right ear | Yes |
| H70..002 | Acute mastoiditis without complications, left ear | Yes |
| H70..003 | Acute mastoiditis without complications, bilateral | Yes |
| H70..009 | Acute mastoiditis without complications, unspecified ear | Yes |
| H70..01 | Subperiosteal abscess of mastoid | No |
| H70..011 | Subperiosteal abscess of mastoid, right ear | Yes |
| H70..012 | Subperiosteal abscess of mastoid, left ear | Yes |
| H70..013 | Subperiosteal abscess of mastoid, bilateral | Yes |
| H70..019 | Subperiosteal abscess of mastoid, unspecified ear | Yes |
| H70..09 | Acute mastoiditis with other complications | No |
| H70..091 | Acute mastoiditis with other complications, right ear | Yes |
| H70..092 | Acute mastoiditis with other complications, left ear | Yes |
| H70..093 | Acute mastoiditis with other complications, bilateral | Yes |
| H70..099 | Acute mastoiditis with other complications, unspecified ear | Yes |
| H70..1 | Chronic mastoiditis | No |
| H70..10 | Chronic mastoiditis, unspecified ear | Yes |
| H70..11 | Chronic mastoiditis, right ear | Yes |
| H70..12 | Chronic mastoiditis, left ear | Yes |
| H70..13 | Chronic mastoiditis, bilateral | Yes |
| H70..2 | Petrositis | No |
| H70..20 | Unspecified petrositis | No |
| H70..201 | Unspecified petrositis, right ear | Yes |
| H70..202 | Unspecified petrositis, left ear | Yes |
| H70..203 | Unspecified petrositis, bilateral | Yes |
| H70..209 | Unspecified petrositis, unspecified ear | Yes |
| H70..21 | Acute petrositis | No |
| H70..211 | Acute petrositis, right ear | Yes |
| H70..212 | Acute petrositis, left ear | Yes |
| H70..213 | Acute petrositis, bilateral | Yes |
| H70..219 | Acute petrositis, unspecified ear | Yes |
| H70..22 | Chronic petrositis | No |
| H70..221 | Chronic petrositis, right ear | Yes |
| H70..222 | Chronic petrositis, left ear | Yes |
| H70..223 | Chronic petrositis, bilateral | Yes |
| H70..229 | Chronic petrositis, unspecified ear | Yes |
| H70..8 | Other mastoiditis and related conditions | No |
| H70..81 | Postauricular fistula | No |
| H70..811 | Postauricular fistula, right ear | Yes |
| H70..812 | Postauricular fistula, left ear | Yes |
| H70..813 | Postauricular fistula, bilateral | Yes |
| H70..819 | Postauricular fistula, unspecified ear | Yes |
| H70..89 | Other mastoiditis and related conditions | No |
| H70..891 | Other mastoiditis and related conditions, right ear | Yes |
| H70..892 | Other mastoiditis and related conditions, left ear | Yes |
| H70..893 | Other mastoiditis and related conditions, bilateral | Yes |
| H70..899 | Other mastoiditis and related conditions, unspecified ear | Yes |
| H70..9 | Unspecified mastoiditis | No |
| H70..90 | Unspecified mastoiditis, unspecified ear | Yes |
| H70..91 | Unspecified mastoiditis, right ear | Yes |
| H70..92 | Unspecified mastoiditis, left ear | Yes |
| H70..93 | Unspecified mastoiditis, bilateral | Yes |
Last reviewed: September 2026