H74.312 Ankylosis of ear ossicles, left ear

Billable ICD-10-CM code, FY2026.

Applies from H74 Other disorders of middle ear mastoid

Excludes2 (not included here)

• mastoiditis (H70.-)

MS-DRG index

Defines the logic of DRG(s) 154-156 in MDC 03.

Approximate ICD-9-CM (GEMs)

• 385.21 Impaired mobility of malleus (approximate)
• 385.22 Impaired mobility of other ear ossicles (approximate)

Nearby codes

• H74.22 Discontinuity and dislocation of left ear ossicles
• H74.23 Discontinuity and dislocation of ear ossicles, bilateral
• H74.3 Other acquired abnormalities of ear ossicles
• H74.31 Ankylosis of ear ossicles
• H74.311 Ankylosis of ear ossicles, right ear
• H74.312 Ankylosis of ear ossicles, left ear (this code)
• H74.313 Ankylosis of ear ossicles, bilateral
• H74.319 Ankylosis of ear ossicles, unspecified ear
• H74.32 Partial loss of ear ossicles
• H74.321 Partial loss of ear ossicles, right ear
• H74.322 Partial loss of ear ossicles, left ear