H74

Other disorders of middle ear mastoid

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027

SourceCMS ICD-10-CM order file

ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODE	DESCRIPTION	TYPE
H74.0	Tympanosclerosis	Category
H74.01	Tympanosclerosis, right ear	Billable
H74.02	Tympanosclerosis, left ear	Billable
H74.03	Tympanosclerosis, bilateral	Billable
H74.09	Tympanosclerosis, unspecified ear	Billable
H74.1	Adhesive middle ear disease	Category
H74.11	Adhesive right middle ear disease	Billable
H74.12	Adhesive left middle ear disease	Billable
H74.13	Adhesive middle ear disease, bilateral	Billable
H74.19	Adhesive middle ear disease, unspecified ear	Billable
H74.2	Discontinuity and dislocation of ear ossicles	Category
H74.20	Discontinuity and dislocation of ear ossicles, unspecified ear	Billable
H74.21	Discontinuity and dislocation of right ear ossicles	Billable
H74.22	Discontinuity and dislocation of left ear ossicles	Billable
H74.23	Discontinuity and dislocation of ear ossicles, bilateral	Billable
H74.3	Other acquired abnormalities of ear ossicles	Category
H74.31	Ankylosis of ear ossicles	Category
H74.311	Ankylosis of ear ossicles, right ear	Billable
H74.312	Ankylosis of ear ossicles, left ear	Billable
H74.313	Ankylosis of ear ossicles, bilateral	Billable
H74.319	Ankylosis of ear ossicles, unspecified ear	Billable
H74.32	Partial loss of ear ossicles	Category
H74.321	Partial loss of ear ossicles, right ear	Billable
H74.322	Partial loss of ear ossicles, left ear	Billable
H74.323	Partial loss of ear ossicles, bilateral	Billable
H74.329	Partial loss of ear ossicles, unspecified ear	Billable
H74.39	Other acquired abnormalities of ear ossicles	Category
H74.391	Other acquired abnormalities of right ear ossicles	Billable
H74.392	Other acquired abnormalities of left ear ossicles	Billable
H74.393	Other acquired abnormalities of ear ossicles, bilateral	Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.