ICD-10-CM > H60-H95 > H65-H75 > H74 > H74.3 > H74.31 H74.31 Ankylosis of ear ossicles Non-Billable/Non-Specific Codes H74.311Ankylosis of ear ossicles, right earH74.312Ankylosis of ear ossicles, left earH74.313Ankylosis of ear ossicles, bilateralH74.319Ankylosis of ear ossicles, unspecified ear