ICD-10 Code H80.9 – Unspecified Otosclerosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.9 – Unspecified otosclerosis
What it is
H80.9 identifies otosclerosis when the chart does not specify the site or type. It refers to abnormal bone remodeling in the otic capsule that can affect hearing, but the record lacks further detail.
Clinical signs
Common findings include progressive hearing loss, often conductive, and sometimes tinnitus. Clinical features vary; refer to documentation, especially when audiology or otoscopic details are limited.
When to use this code
Use H80.9 when the provider documents otosclerosis but does not state whether it is fenestral, cochlear, or another form. It also fits when laterality or subtype is not recorded. Code from the documentation you have, not from assumptions.
Do not use for
Do not use this code if the record specifies a more precise otosclerosis type or another cause of hearing loss. Check documentation before defaulting to unspecified disease.
Coding tip
If the note mentions otosclerosis without detail, choose H80.9 only after confirming no subtype or laterality is documented.