| H70 | Mastoiditis and related conditions | NON-BILLABLE CODE |
| H70.0 | Acute mastoiditis | NON-BILLABLE CODE |
| H70.00 | Acute mastoiditis without complications | NON-BILLABLE CODE |
| H70.001 | Acute mastoiditis without complications, right ear | BILLABLE CODE |
| H70.002 | Acute mastoiditis without complications, left ear | BILLABLE CODE |
| H70.003 | Acute mastoiditis without complications, bilateral | BILLABLE CODE |
| H70.009 | Acute mastoiditis without complications, unspecified ear | BILLABLE CODE |
| H70.01 | Subperiosteal abscess of mastoid | NON-BILLABLE CODE |
| H70.011 | Subperiosteal abscess of mastoid, right ear | BILLABLE CODE |
| H70.012 | Subperiosteal abscess of mastoid, left ear | BILLABLE CODE |
| H70.013 | Subperiosteal abscess of mastoid, bilateral | BILLABLE CODE |
| H70.019 | Subperiosteal abscess of mastoid, unspecified ear | BILLABLE CODE |
| H70.09 | Acute mastoiditis with other complications | NON-BILLABLE CODE |
| H70.091 | Acute mastoiditis with other complications, right ear | BILLABLE CODE |
| H70.092 | Acute mastoiditis with other complications, left ear | BILLABLE CODE |
| H70.093 | Acute mastoiditis with other complications, bilateral | BILLABLE CODE |
| H70.099 | Acute mastoiditis with other complications, unspecified ear | BILLABLE CODE |
| H70.1 | Chronic mastoiditis | NON-BILLABLE CODE |
| H70.10 | Chronic mastoiditis, unspecified ear | BILLABLE CODE |
| H70.11 | Chronic mastoiditis, right ear | BILLABLE CODE |
| H70.12 | Chronic mastoiditis, left ear | BILLABLE CODE |
| H70.2 | Petrositis | NON-BILLABLE CODE |
| H70.20 | Unspecified petrositis | NON-BILLABLE CODE |
| H70.201 | Unspecified petrositis, right ear | BILLABLE CODE |
| H70.202 | Unspecified petrositis, left ear | BILLABLE CODE |
| H70.203 | Unspecified petrositis, bilateral | BILLABLE CODE |
| H70.209 | Unspecified petrositis, unspecified ear | BILLABLE CODE |
| H70.21 | Acute petrositis | NON-BILLABLE CODE |
| H70.211 | Acute petrositis, right ear | BILLABLE CODE |
| H70.212 | Acute petrositis, left ear | BILLABLE CODE |
| H70.213 | Acute petrositis, bilateral | BILLABLE CODE |
| H70.219 | Acute petrositis, unspecified ear | BILLABLE CODE |
| H70.22 | Chronic petrositis | NON-BILLABLE CODE |
| H70.221 | Chronic petrositis, right ear | BILLABLE CODE |
| H70.222 | Chronic petrositis, left ear | BILLABLE CODE |
| H70.223 | Chronic petrositis, bilateral | BILLABLE CODE |
| H70.229 | Chronic petrositis, unspecified ear | BILLABLE CODE |
| H70.8 | Other mastoiditis and related conditions | NON-BILLABLE CODE |
| H70.81 | Postauricular fistula | NON-BILLABLE CODE |
| H70.811 | Postauricular fistula, right ear | BILLABLE CODE |
| H70.812 | Postauricular fistula, left ear | BILLABLE CODE |
| H70.813 | Postauricular fistula, bilateral | BILLABLE CODE |
| H70.819 | Postauricular fistula, unspecified ear | BILLABLE CODE |
| H70.89 | Other mastoiditis and related conditions | NON-BILLABLE CODE |
| H70.891 | Other mastoiditis and related conditions, right ear | BILLABLE CODE |
| H70.892 | Other mastoiditis and related conditions, left ear | BILLABLE CODE |
| H70.893 | Other mastoiditis and related conditions, bilateral | BILLABLE CODE |
| H70.899 | Other mastoiditis and related conditions, unspecified ear | BILLABLE CODE |
| H70.9 | Unspecified mastoiditis | NON-BILLABLE CODE |
| H70.90 | Unspecified mastoiditis, unspecified ear | BILLABLE CODE |
| H70.91 | Unspecified mastoiditis, right ear | BILLABLE CODE |
| H70.92 | Unspecified mastoiditis, left ear | BILLABLE CODE |
| H70.93 | Unspecified mastoiditis, bilateral | BILLABLE CODE |
