| H74 | Other disorders of middle ear mastoid | NON-BILLABLE CODE |
| H74.0 | Tympanosclerosis | NON-BILLABLE CODE |
| H74.01 | Tympanosclerosis, right ear | BILLABLE CODE |
| H74.02 | Tympanosclerosis, left ear | BILLABLE CODE |
| H74.03 | Tympanosclerosis, bilateral | BILLABLE CODE |
| H74.09 | Tympanosclerosis, unspecified ear | BILLABLE CODE |
| H74.1 | Adhesive middle ear disease | NON-BILLABLE CODE |
| H74.11 | Adhesive right middle ear disease | BILLABLE CODE |
| H74.12 | Adhesive left middle ear disease | BILLABLE CODE |
| H74.13 | Adhesive middle ear disease, bilateral | BILLABLE CODE |
| H74.19 | Adhesive middle ear disease, unspecified ear | BILLABLE CODE |
| H74.2 | Discontinuity and dislocation of ear ossicles | NON-BILLABLE CODE |
| H74.20 | Discontinuity and dislocation of ear ossicles, unspecified ear | BILLABLE CODE |
| H74.21 | Discontinuity and dislocation of right ear ossicles | BILLABLE CODE |
| H74.22 | Discontinuity and dislocation of left ear ossicles | BILLABLE CODE |
| H74.23 | Discontinuity and dislocation of ear ossicles, bilateral | BILLABLE CODE |
| H74.3 | Other acquired abnormalities of ear ossicles | NON-BILLABLE CODE |
| 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 |
| H74.393 | Other acquired abnormalities of ear ossicles, bilateral | BILLABLE CODE |
| H74.399 | Other acquired abnormalities of ear ossicles, unspecified ear | BILLABLE CODE |
| H74.4 | Polyp of middle ear | NON-BILLABLE CODE |
| H74.40 | Polyp of middle ear, unspecified ear | BILLABLE CODE |
| H74.41 | Polyp of right middle ear | BILLABLE CODE |
| H74.42 | Polyp of left middle ear | BILLABLE CODE |
| H74.43 | Polyp of middle ear, bilateral | BILLABLE CODE |
| H74.8 | Other specified disorders of middle ear and mastoid | NON-BILLABLE CODE |
| H74.8X | Other specified disorders of middle ear and mastoid | NON-BILLABLE CODE |
| H74.8X1 | Other specified disorders of right middle ear and mastoid | BILLABLE CODE |
| H74.8X2 | Other specified disorders of left middle ear and mastoid | BILLABLE CODE |
| H74.8X3 | Other specified disorders of middle ear and mastoid, bilateral | BILLABLE CODE |
| H74.8X9 | Other specified disorders of middle ear and mastoid, unspecified ear | BILLABLE CODE |
| H74.9 | Unspecified disorder of middle ear and mastoid | NON-BILLABLE CODE |
| H74.90 | Unspecified disorder of middle ear and mastoid, unspecified ear | BILLABLE CODE |
| H74.91 | Unspecified disorder of right middle ear and mastoid | BILLABLE CODE |
| H74.92 | Unspecified disorder of left middle ear and mastoid | BILLABLE CODE |
| H74.93 | Unspecified disorder of middle ear and mastoid, bilateral | BILLABLE CODE |
