H90.6 Mixed conductive and sensorineural hearing loss, bilateral

Name of the Condition

• Mixed Conductive and Sensorineural Hearing Loss, Bilateral (ICD-10 Code: H90.6)

Summary

Mixed conductive and sensorineural hearing loss, bilateral, is a condition where both the outer/middle ear (conductive component) and inner ear/auditory nerve (sensorineural component) are affected, resulting in reduced hearing ability in both ears. This type of hearing loss combines the challenges of sound transmission issues with inner ear or nerve damage, often leading to more severe hearing impairment than either type alone.

Causes

Mixed hearing loss may result from a combination of factors affecting different parts of the ear. The conductive component can stem from blockages, infections, or structural abnormalities in the outer or middle ear, while the sensorineural component may arise from inner ear damage, auditory nerve disorders, or age-related changes. Common causes include chronic ear infections, otosclerosis, noise exposure, or trauma affecting multiple ear structures.

Risk Factors

• Recurrent or chronic ear infections (otitis media).
• Exposure to loud noises over time.
• Age-related hearing changes (presbycusis).
• Genetic predispositions to hearing loss.
• History of ear surgery or trauma.
• Use of ototoxic medications (e.g., certain antibiotics or chemotherapy drugs).

Symptoms

• Difficulty hearing faint or soft sounds in both ears.
• Muffled or distorted speech perception.
• Reduced ability to understand speech in noisy environments.
• Sensation of fullness or pressure in the ears (if conductive component present).
• Possible tinnitus (ringing in the ears) if sensorineural component is involved.

Diagnosis

Diagnosis involves a combination of physical examination by an ENT specialist, audiometric testing to assess both air and bone conduction, and imaging studies (e.g., MRI or CT scans) to evaluate ear structures. Additional tests may include tympanometry to check middle ear function and otoacoustic emissions to assess inner ear health.

Treatment Options

Treatment depends on the underlying causes and severity. Options may include hearing aids to amplify sounds, surgical interventions for correctable conductive issues (e.g., ear tube placement or ossicular reconstruction), and cochlear implants for severe sensorineural components. Management often involves a multidisciplinary approach, including audiologists and speech therapists.

Prognosis and Follow-Up

Prognosis varies based on the cause and extent of damage. While some conductive components may be reversible with treatment, sensorineural loss is often permanent. Regular follow-up with an ENT specialist and audiologist is recommended to monitor hearing changes, adjust interventions, and address any new symptoms promptly.

Complications

Untreated mixed hearing loss can lead to communication difficulties, social isolation, and reduced quality of life. In children, it may affect speech and language development. Severe cases may increase the risk of falls or cognitive decline due to reduced environmental awareness.

Lifestyle & Prevention

• Protect ears from loud noises using earplugs or earmuffs.
• Manage ear infections promptly to prevent chronic issues.
• Avoid ototoxic medications when possible or use under medical supervision.
• Maintain good ear hygiene to prevent wax buildup or blockages.
• Consider regular hearing screenings, especially with risk factors like age or noise exposure.

When to Seek Professional Help

Seek medical attention if you experience sudden or progressive hearing loss, persistent ear pain, discharge, or difficulty understanding speech. Early evaluation is crucial for identifying reversible causes and preventing further damage.

Tips for Medical Coders

When coding H90.6, ensure documentation specifies bilateral involvement and confirms both conductive and sensorineural components. Include details on the underlying causes (e.g., chronic otitis media, otosclerosis) and any contributing factors (e.g., noise exposure, ototoxic drugs) to support accurate code assignment. Verify that the diagnosis aligns with audiometric test results and clinical findings.