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H80.8 - Other Otosclerosis | ICD-10 Explained

H80.8 is the ICD-10 code for other forms of otosclerosis. It refers to abnormal bone remodeling in the inner ear that can lead to progressive hearing loss.

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Things worth knowing about "H80.8"

H80.8 is the ICD-10 code for other forms of otosclerosis. It refers to abnormal bone remodeling in the inner ear that can lead to progressive hearing loss.

What Does the ICD-10 Code H80.8 Mean?

The ICD-10 code H80.8 stands for other forms of otosclerosis that are not covered by the more specific subcategories within the H80 classification. Otosclerosis is a disorder of the bony labyrinth of the inner ear, in which abnormal bone remodeling occurs around the ossicles or the cochlea (the spiral-shaped hearing organ). These changes impair the normal transmission of sound and can lead to progressive hearing loss.

Causes

The exact cause of otosclerosis is not fully understood. The following contributing factors are discussed:

Genetic predisposition: A familial pattern is well recognized; the condition is inherited in an autosomal dominant pattern with incomplete penetrance.
Hormonal influences: Pregnancy may accelerate the progression of the disease.
Viral infections: Involvement of the measles virus has been discussed as a possible triggering factor.
Immunological factors: Autoimmune reactions may play a role in the development of the condition.

Symptoms

The clinical signs of otosclerosis coded under H80.8 can vary but typically include:

Progressive hearing loss: Usually beginning in early adulthood, often affecting both ears.
Tinnitus: Ringing or buzzing sounds in the ear as an accompanying symptom.
Dizziness: Balance disturbances may occur in rarer cases.
Paracusis Willisii: A paradoxical phenomenon in which affected individuals hear better in noisy environments.

Diagnosis

Diagnosis is established using several examination methods:

Audiometry: Pure-tone audiogram to determine the extent of hearing loss.
Tympanometry: Measurement of middle ear function to detect stiffening of the ossicles.
CT of the petrous bone: Imaging to visualize bony changes in the inner ear.
Otoscopy: Examination of the eardrum, which typically appears normal in otosclerosis.

Treatment

Treatment depends on the severity of the hearing loss and the structure affected:

Surgical Treatment

Stapedectomy or stapedotomy is the preferred surgical procedure for conductive hearing loss. The abnormally fixed stapes (stirrup bone) is replaced with a prosthesis to restore sound conduction.

Hearing Aids

When surgery is contraindicated or cochlear involvement is present, hearing aids can be used to compensate for the hearing impairment.

Medical Therapy

The use of sodium fluoride is discussed in some cases to slow down the bone remodeling process. However, the evidence base for this approach remains limited.

References

World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10). Diseases of the ear and mastoid process, H80-H83.
Dhillon RS, East CA: Ear, Nose and Throat and Head and Neck Surgery. 4th edition. Churchill Livingstone, Edinburgh 2013.
Browning GG, Merchant SN, Kelly G et al.: Otosclerosis. In: Gleeson M (ed.): Scott-Brown's Otorhinolaryngology, Head and Neck Surgery. 7th edition. Hodder Arnold, London 2008.

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