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ICD-10-CM 2027

ICD-10 code for ear ossicles ankylosis

H74.31

Ankylosis of ear ossicles

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Ankylosis (fibrous) (osseous) (joint) › ear ossicles”. Page updated September 29, 2026.

About coding ear ossicles ankylosis

The ICD-10-CM code for ear ossicles ankylosis is H74.31 (Ankylosis of ear ossicles).

Within H74.3 (other acquired abnormalities of ear ossicles), H74.31 is specifically for ankylosis of ear ossicles. Related codes cover partial loss of ear ossicles (H74.32) and other acquired abnormalities of ear ossicles (H74.39).

To report this condition, pick the subcode that matches the documentation: H74.311 (right ear), H74.312 (left ear), H74.313 (bilateral) and H74.319 (unspecified ear).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about ear ossicles ankylosis ICD-10 codes

What is the ICD-10 code for ear ossicles ankylosis?

H74.31 — Ankylosis of ear ossicles (a header code; report a more specific subcode).

Is H74.31 billable?

No. H74.31 is a header code. Report one of its more specific subcodes instead.