H91: Other hearing loss

H91.8: Other specified hearing loss

The ear is a sensory organ that is used to hear and to maintain one's balance. There are 3 different areas in the ear: the outer ear, middle ear and inner ear. The actual hearing organ, the cochlea, is in the inner ear. The cochlea consists of a channel of bone in a spiral, like a snail. Inside the cochlea are the sensory cells for hearing. The inner ear connects to the brain via the auditory nerve.

When someone's hearing is worse than before, this is also known as hearing loss. With hearing loss of this type, one may even lose the ability to hear entirely.