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ICD Hub / Diseases of the ear or mastoid process (H60–H95) / AA11 - Acute noninfectious otitis externa
ICD-11

ICD-11 Codes
for AA11 - Acute noninfectious otitis externa
Teodor Jurukovski January 1, 1970
Fact checked by: Teodor Jurukovski
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Understanding Acute Noninfectious Otitis Externa (AA11)

Acute noninfectious otitis externa, identified by the ICD-11 code AA11, refers to a rapid onset of inflammation affecting the external ear canal. This condition is characterised by eczematous changes and occurs when the cause cannot be more precisely classified. It is a non-infective form of otitis externa, distinct from bacterial or fungal infections, though it can sometimes be associated with underlying dermatological conditions. The inflammation typically affects the outer ear canal and may extend to the pinna or tragus.

Key Symptoms of Acute Noninfectious Otitis Externa

Patients experiencing acute noninfectious otitis externa often present with a range of symptoms. These commonly include itching (pruritus) and discomfort or pain in the ear, which can be exacerbated by touching or manipulating the auricle or tragus. Redness, swelling, and scaling of the ear canal skin are typical physical findings. In some cases, there may be ear discharge or a sensation of fullness in the ear. Hearing loss can occur if swelling significantly obstructs the ear canal. While typically not associated with systemic symptoms like fever, severe pain might suggest a more extensive condition.

Factors Contributing to Acute Noninfectious Otitis Externa

The exact cause of acute noninfectious otitis externa can be varied, often stemming from disruptions to the ear canal's natural protective mechanisms. Factors that can predispose individuals to this condition include exposure to humidity, trauma to the ear canal (such as from cotton swabs or hearing aids), and pre-existing dermatological conditions like eczema or psoriasis. Narrow ear canals, ear canal obstruction by cerumen, stress, and a compromised immune system can also increase susceptibility.

Diagnosing Acute Noninfectious Otitis Externa

The diagnosis of acute noninfectious otitis externa is primarily clinical, based on a thorough patient history and a physical examination of the ear. Healthcare providers will assess the auricle and ear canal for signs of inflammation, swelling, and debris. While cultures are not typically required for uncomplicated cases, they may be considered for recurrent or resistant presentations. The ICD-11 code AA11 is used when the condition is identified as acute and noninfectious, and not more specifically classified.

Managing Acute Noninfectious Otitis Externa

Treatment for acute noninfectious otitis externa focuses on reducing inflammation, managing pain, and restoring the ear canal's health. This often involves topical treatments such as corticosteroid drops to reduce inflammation and itching, sometimes combined with acidic solutions to restore the ear canal's pH. Pain relief can be achieved with over-the-counter analgesics or prescription medications for severe pain. In cases of significant swelling, an ear wick may be inserted to help deliver medication deeper into the canal and reduce oedema. While oral antibiotics are generally not indicated for non-infectious otitis externa, they may be considered in specific circumstances or if a secondary infection is suspected.

Alternative Names for Acute Noninfectious Otitis Externa

Acute noninfectious otitis externa is known by several other terms, reflecting its clinical presentation. These include non-infective acute otitis externa and acute eczematoid otitis externa. It is also sometimes referred to colloquially as swimmer's ear, although this term can encompass infectious causes as well. The ICD-11 code AA11 specifically denotes the non-infectious, acute presentation.

ICD-11 Coding for Acute Noninfectious Otitis Externa

The official ICD-11 code for Acute noninfectious otitis externa is AA11. This code is used for documentation and billing purposes when a patient presents with a rapid onset of eczematous inflammation of the outer ear where an infectious cause cannot be identified or is not the primary classification. Clinicians may use postcoordination with codes for laterality (e.g., left, right, bilateral) or specific anatomical sites within the external ear to provide more detailed information. This specific ICD-11 code for acute noninfectious otitis externa ensures precise medical record-keeping.

Frequently asked questions

What is the ICD-11 classification meaning of AA11 Acute noninfectious otitis externa?
AA11 Acute noninfectious otitis externa describes the rapid onset of eczematous inflammation of the outer ear where the cause cannot be more precisely classified.
What conditions are excluded from AA11 Acute noninfectious otitis externa in ICD-11?
ICD-11 excludes AA11 Acute noninfectious otitis externa from acute seborrhoeic otitis externa (AA10), allergic contact dermatitis of the external ear (EG40.0), and irritant contact dermatitis of the external ear (EK02).
Can laterality be specified when coding AA11 Acute noninfectious otitis externa in ICD-11?
Yes, post-coordination allows for the specification of laterality for AA11 Acute noninfectious otitis externa, including options such as bilateral, left, right, or unilateral (unspecified).
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