| H74.31 | Ankylosis of ear ossicles | NON-BILLABLE CODE |
| H74.311 | Ankylosis of ear ossicles, right ear | BILLABLE CODE |
| H74.312 | Ankylosis of ear ossicles, left ear | BILLABLE CODE |
| H74.313 | Ankylosis of ear ossicles, bilateral | BILLABLE CODE |
| H74.319 | Ankylosis of ear ossicles, unspecified ear | BILLABLE CODE |
| H74.32 | Partial loss of ear ossicles | NON-BILLABLE CODE |
| H74.321 | Partial loss of ear ossicles, right ear | BILLABLE CODE |
| H74.322 | Partial loss of ear ossicles, left ear | BILLABLE CODE |
| H74.323 | Partial loss of ear ossicles, bilateral | BILLABLE CODE |
| H74.329 | Partial loss of ear ossicles, unspecified ear | BILLABLE CODE |
| H74.39 | Other acquired abnormalities of ear ossicles | NON-BILLABLE CODE |
| H74.391 | Other acquired abnormalities of right ear ossicles | BILLABLE CODE |
| H74.392 | Other acquired abnormalities of left ear ossicles | BILLABLE CODE |
| H74.393 | Other acquired abnormalities of ear ossicles, bilateral | BILLABLE CODE |
| H74.399 | Other acquired abnormalities of ear ossicles, unspecified ear | BILLABLE CODE |
