| 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 |
