ICD-10 Diagnosis Code Q03.0

Malformations of aqueduct of Sylvius

Diagnosis Code Q03.0

ICD-10: Q03.0
Short Description: Malformations of aqueduct of Sylvius
Long Description: Malformations of aqueduct of Sylvius
This is the 2017 version of the ICD-10-CM diagnosis code Q03.0

Code Classification
  • Congenital malformations, deformations and chromosomal abnormalities
    • Congenital malformations of the nervous system (Q00-Q07)
      • Congenital hydrocephalus (Q03)

Information for Medical Professionals

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.

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 Q03.0 is exempt from POA reporting.

  • Aqueduct of Sylvius anomaly
  • Congenital atresia of aqueduct of Sylvius
  • Congenital obstruction of aqueduct of Sylvius
  • Congenital stenosis of aqueduct of Sylvius
  • Hydrocephalus associated with congenital aqueduct stenosis
  • Hydrocephalus with anomaly of aqueduct of Sylvius
  • Spina bifida with stenosis of aqueduct of Sylvius

Index of Diseases and Injuries
References found for the code Q03.0 in the Index of Diseases and Injuries:

Information for Patients


Also called: Water on the brain

Hydrocephalus is the buildup of too much cerebrospinal fluid in the brain. Normally, this fluid cushions your brain. When you have too much, though, it puts harmful pressure on your brain.

Hydrocephalus can be congenital, or present at birth. Causes include genetic problems and problems with how the fetus develops. An unusually large head is the main sign of congenital hydrocephalus.

Hydrocephalus can also happen after birth. This is called acquired hydrocephalus. It can occur at any age. Causes can include head injuries, strokes, infections, tumors, and bleeding in the brain. Symptoms include

  • Headache
  • Vomiting and nausea
  • Blurry vision
  • Balance problems
  • Bladder control problems
  • Thinking and memory problems

Hydrocephalus can permanently damage the brain, causing problems with physical and mental development. If untreated, it is usually fatal. With treatment, many people lead normal lives with few limitations. Treatment usually involves surgery to insert a shunt. A shunt is a flexible but sturdy plastic tube. The shunt moves the cerebrospinal fluid to another area of the body where it can be absorbed. Medicine and rehabilitation therapy can also help.

NIH: National Institute of Neurological Disorders and Stroke

  • Brain surgery
  • Hydrocephalus
  • Normal pressure hydrocephalus (NPH)
  • Ventriculoperitoneal shunt
  • Ventriculoperitoneal shunt - discharge

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