ICD-10 Code H80.91 – Unspecified Otosclerosis, Right Ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.91 – Unspecified otosclerosis, right ear
What it is
H80.91 identifies otosclerosis affecting the right ear when the record does not specify the exact type. It refers to abnormal bone remodeling in the middle ear that can interfere with sound conduction.
Clinical signs
Typical findings include progressive conductive hearing loss, often with a normal tympanic membrane. Tinnitus or a family history may be present; clinical features vary, so refer to documentation.
When to use this code
Use H80.91 when the provider documents otosclerosis in the right ear but does not describe it as fenestral, cochlear, or another specified form. It is appropriate for confirmed right-sided disease in outpatient, inpatient, or specialist notes. If the record only says suspected hearing loss, check documentation before coding.
Do not use for
Do not use this code for otosclerosis of the left ear, bilateral otosclerosis, or more specific documented subtypes. Also avoid it when the note describes hearing loss without confirming otosclerosis.
Coding tip
Code the laterality exactly as documented and query if the ear or type is unclear.