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H66.3 – Chronic Otitis Media Explained

H66.3 is the ICD-10 code for chronic otitis media, a persistent inflammation of the middle ear that can lead to hearing loss and other complications.

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Things worth knowing about "H66.3"

H66.3 is the ICD-10 code for chronic otitis media, a persistent inflammation of the middle ear that can lead to hearing loss and other complications.

What is H66.3 – Chronic Otitis Media?

The ICD-10 code H66.3 refers to chronic otitis media, a long-lasting or recurrent inflammation of the middle ear. Unlike acute otitis media, the chronic form persists for several weeks or months and can cause permanent damage to the eardrum or the small bones of the middle ear (ossicles).

Causes

Chronic otitis media often develops from an incompletely resolved acute middle ear infection. Other contributing causes and risk factors include:

Recurrent bacterial or viral upper respiratory tract infections
Dysfunction of the Eustachian tube (the canal connecting the middle ear to the back of the throat), which impairs pressure regulation
Allergies or chronic sinusitis
Tympanic membrane perforation (a hole in the eardrum)
Immune deficiency or underlying systemic diseases
Exposure to passive smoking, particularly in children

Symptoms

Symptoms of chronic otitis media can vary in severity and may include:

Ear pain or a feeling of pressure in the ear (often less intense than in the acute form)
Hearing loss or reduced hearing in the affected ear
Ear discharge (otorrhea) – purulent or mucous secretion from the ear
Tinnitus (ringing or buzzing in the ear)
Occasional dizziness or balance disturbances
Recurrent infections without complete resolution

Diagnosis

Diagnosis is made by an ENT (ear, nose, and throat) specialist using the following methods:

Otoscopy: Direct visual examination of the eardrum and ear canal
Audiometry: Assessment of hearing ability
Tympanometry: Evaluation of eardrum and middle ear mobility
Ear swab and microbiological culture in cases of discharge
Imaging studies (CT or MRI) if complications such as cholesteatoma are suspected

Treatment

Treatment depends on the underlying cause and the extent of the condition:

Conservative Treatment

Local or systemic antibiotics for bacterial infections
Ear drops containing antibiotic or anti-inflammatory agents
Suction clearance of secretions from the middle ear
Management of underlying conditions (e.g., allergies, enlarged adenoids)

Surgical Treatment

Paracentesis (myringotomy): A small incision in the eardrum to allow drainage
Insertion of tympanostomy tubes (grommets) to ventilate the middle ear
Tympanoplasty: Surgical reconstruction of the eardrum and ossicles
Surgical removal of a cholesteatoma if present

Complications

If left untreated or poorly managed, chronic otitis media can lead to serious complications:

Permanent hearing loss
Development of a cholesteatoma (an abnormal skin growth in the middle ear)
Mastoiditis (infection of the mastoid bone behind the ear)
In rare cases: meningitis or brain abscess

References

World Health Organization (WHO): ICD-10 International Classification of Diseases, 10th Revision. Geneva, 2019.
Casselbrant ML, Mandel EM: Epidemiology of otitis media. In: Rosenfeld RM, Bluestone CD (eds.): Evidence-Based Otitis Media. 2nd ed. Hamilton: BC Decker, 2003.
Schilder AGM et al.: Otitis media. Nature Reviews Disease Primers, 2016; 2: 16063. doi:10.1038/nrdp.2016.63.

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