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H90.7 - Mixed Bilateral Hearing Loss ICD-10
H90.7 is an ICD-10 code for mixed conductive and sensorineural hearing loss, bilateral. It describes a combined hearing impairment affecting both ears.
Add as Preferred SourceThings worth knowing about "H90.7"
H90.7 is an ICD-10 code for mixed conductive and sensorineural hearing loss, bilateral. It describes a combined hearing impairment affecting both ears.
What Does the ICD-10 Code H90.7 Mean?
The ICD-10 code H90.7 refers to mixed conductive and sensorineural hearing loss, bilateral. This means that a patient has both a conductive hearing loss (affecting the outer or middle ear) and a sensorineural hearing loss (affecting the inner ear or auditory nerve) simultaneously in both ears.
Types of Hearing Loss
Conductive Hearing Loss
Conductive hearing loss occurs when sound cannot be transmitted efficiently from the outer ear to the inner ear. Common causes include earwax blockage, middle ear infections (otitis media), perforated eardrum, or ossicular chain dysfunction.
Sensorineural Hearing Loss
Sensorineural hearing loss involves damage to the inner ear (cochlea) or the auditory nerve. It can result from noise exposure, age-related hearing loss (presbycusis), viral infections, or genetic factors.
Causes
- Chronic otitis media with additional inner ear involvement
- Otosclerosis with cochlear involvement
- Traumatic injury to both ears
- Age-related hearing decline combined with middle ear changes
- Genetic or congenital disorders
- Prolonged noise exposure combined with middle ear disease
Symptoms
- Reduced hearing acuity in both ears
- Difficulty understanding speech, especially in noisy environments
- Tinnitus (ringing or buzzing in the ears)
- Sensation of fullness or pressure in the ears
- Difficulty localizing the direction of sounds
Diagnosis
The diagnosis of bilateral mixed hearing loss is made by an ENT specialist (ear, nose, and throat physician). The following examinations are typically used:
- Pure-tone audiometry: Measurement of hearing thresholds at different frequencies
- Tympanometry: Assessment of middle ear function
- Speech audiometry: Evaluation of speech understanding
- BERA (Brainstem Evoked Response Audiometry): Measurement of auditory nerve activity
- Imaging: CT or MRI when structural abnormalities are suspected
Treatment
Treatment depends on the underlying cause and the severity of hearing loss:
- Hearing aids: The most common intervention for moderate to severe hearing loss
- Surgical procedures: For middle ear problems (e.g., tympanoplasty, stapedectomy)
- Cochlear implant: For severe to profound sensorineural hearing loss
- Medication: For inflammatory or infectious causes
- Hearing rehabilitation: Speech therapy and auditory training programs
References
- World Health Organization (WHO): International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10), Chapter VIII: Diseases of the ear and mastoid process, Code H90.7.
- Katz, J. et al. (eds.): Handbook of Clinical Audiology, 7th edition. Wolters Kluwer Health / Lippincott Williams & Wilkins, 2015.
- American Academy of Otolaryngology - Head and Neck Surgery (AAO-HNS): Clinical Practice Guideline on Hearing Loss in Adults, Otolaryngology-Head and Neck Surgery, 2019.
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