ICD-10 Diagnosis Code Q16.5

Congenital malformation of inner ear

Diagnosis Code Q16.5

ICD-10: Q16.5
Short Description: Congenital malformation of inner ear
Long Description: Congenital malformation of inner ear
This is the 2017 version of the ICD-10-CM diagnosis code Q16.5

Code Classification
  • Congenital malformations, deformations and chromosomal abnormalities
    • Congenital malformations of eye, ear, face and neck (Q10-Q18)
      • Congenital malform of ear causing impairment of hearing (Q16)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code Q16.5 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 744.05 - Anomalies of inner ear

Present on Admission (POA) Additional informationCallout TooltipPresent on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

The code Q16.5 is exempt from POA reporting.

  • Aplasia of the cochlea and vestibular labyrinth
  • Congenital abnormal shape of inner ear
  • Congenital absence of ear
  • Congenital absence of membranous labyrinth
  • Congenital anomaly of inner ear
  • Congenital anomaly of membranous labyrinth
  • Congenital anomaly of organ of Corti
  • Congenital aplasia of inner ear
  • Congenital deafness with labyrinthine aplasia, microtia and microdontia
  • Congenital deformity of labyrinth
  • Incomplete development of membranous labyrinth
  • Incomplete formation of the bony cochlea
  • Mondini defect
  • Structural anomaly of the cochlea and vestibular labyrinth

Index of Diseases and Injuries
References found for the code Q16.5 in the Index of Diseases and Injuries:

Information for Patients

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

A birth defect may affect how the body looks, works or both. Some birth defects like cleft lip or neural tube defects are structural problems that can be easy to see. To find others, like heart defects, doctors use special tests. Birth defects can vary from mild to severe. Some result from exposures to medicines or chemicals. For example, alcohol abuse can cause fetal alcohol syndrome. Infections during pregnancy can also result in birth defects. For most birth defects, the cause is unknown.

Some birth defects can be prevented. Taking folic acid can help prevent some birth defects. Talk to your doctor about any medicines you take. Some medicines can cause serious birth defects.

Babies with birth defects may need surgery or other medical treatments. Today, doctors can diagnose many birth defects in the womb. This enables them to treat or even correct some problems before the baby is born.

Centers for Disease Control and Prevention

  • Intersex

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Ear Disorders

Your ear has three main parts: outer, middle and inner. You use all of them in hearing. Sound waves come in through your outer ear. They reach your middle ear, where they make your eardrum vibrate. The vibrations are transmitted through three tiny bones, called ossicles, in your middle ear. The vibrations travel to your inner ear, a snail-shaped organ. The inner ear makes the nerve impulses that are sent to the brain. Your brain recognizes them as sounds. The inner ear also controls balance.

A variety of conditions may affect your hearing or balance:

  • Ear infections are the most common illness in infants and young children.
  • Tinnitus, a roaring in your ears, can be the result of loud noises, medicines or a variety of other causes.
  • Meniere's disease may be the result of fluid problems in your inner ear; its symptoms include tinnitus and dizziness.
  • Ear barotrauma is an injury to your ear because of changes in barometric (air) or water pressure.

Some ear disorders can result in hearing disorders and deafness.

  • Aural polyps
  • Benign ear cyst or tumor
  • Ear discharge
  • Ear emergencies
  • Ear examination
  • Earache
  • Eardrum repair
  • Otosclerosis
  • Ruptured eardrum
  • Tympanometry
  • Wax blockage

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Hearing Disorders and Deafness

Also called: Hearing loss, Presbycusis

It's frustrating to be unable to hear well enough to enjoy talking with friends or family. Hearing disorders make it hard, but not impossible, to hear. They can often be helped. Deafness can keep you from hearing sound at all.

What causes hearing loss? Some possibilities are

  • Heredity
  • Diseases such as ear infections and meningitis
  • Trauma
  • Certain medicines
  • Long-term exposure to loud noise
  • Aging

There are two main types of hearing loss. One happens when your inner ear or auditory nerve is damaged. This type is usually permanent. The other kind happens when sound waves cannot reach your inner ear. Earwax build-up, fluid, or a punctured eardrum can cause it. Treatment or surgery can often reverse this kind of hearing loss.

Untreated, hearing problems can get worse. If you have trouble hearing, you can get help. Possible treatments include hearing aids, cochlear implants, special training, certain medicines, and surgery.

NIH: National Institute on Deafness and Other Communication Disorders

  • Acoustic trauma
  • Age-related hearing loss
  • Audiometry
  • Ear examination
  • Hearing loss
  • Occupational hearing loss
  • Otosclerosis
  • Sensorineural deafness

[Read More]
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