ICD-10 Code H80.13 – Otosclerosis involving oval window, obliterative, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H80.13 – Otosclerosis involving oval window, obliterative, bilateral
What it is
Use this code for bilateral otosclerosis that affects the oval window with an obliterative pattern. It describes abnormal bone remodeling in the middle ear that can limit sound transmission.
Clinical signs
Common findings include progressive conductive hearing loss and reduced mobility of the stapes or oval window. Tinnitus or mixed hearing loss may occur; clinical features vary, so refer to documentation.
When to use this code
Assign H80.13 when the record clearly states bilateral otosclerosis, oval window involvement, and an obliterative form. Use it when the diagnosis is documented by the clinician, audiology, or operative findings. Check documentation if laterality or subtype is unclear.
Do not use for
Do not use this code for unilateral otosclerosis or for otosclerosis without oval window involvement. Avoid it when the chart only mentions hearing loss or another ear disorder without a confirmed diagnosis.
Coding tip
Code laterality and subtype exactly as documented, and verify that “bilateral” and “obliterative” are both stated before assigning H80.13.