ICD-10 Diagnosis Code G91.0

Communicating hydrocephalus

Diagnosis Code G91.0

ICD-10: G91.0
Short Description: Communicating hydrocephalus
Long Description: Communicating hydrocephalus
This is the 2018 version of the ICD-10-CM diagnosis code G91.0

Valid for Submission
The code G91.0 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the nervous system (G00–G99)
    • Other disorders of the nervous system (G89-G99)
      • Hydrocephalus (G91)

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.
  • 331.3 - Communicat hydrocephalus

  • Acquired communicating hydrocephalus
  • Acquired hydrocephalus
  • Acquired hydrocephalus
  • Communicating hydrocephalus
  • Hydrocephalus due to cerebrospinal fluid absorption defect
  • Hydrocephalus due to cerebrospinal fluid overproduction
  • Hydrocephalus ex vacuo
  • Infantile posthemorrhagic hydrocephalus
  • Intermittently raised pressure hydrocephalus
  • Posthemorrhagic hydrocephalus
  • Postoperative communicating hydrocephalus
  • Post-traumatic communicating hydrocephalus
  • Post-traumatic hydrocephalus
  • Progressive post hemorrhagic ventricular dilatation

Index of Diseases and Injuries
References found for the code G91.0 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 (Medical Encyclopedia)
  • Hydrocephalus (Medical Encyclopedia)
  • Normal pressure hydrocephalus (NPH) (Medical Encyclopedia)
  • Ventriculoperitoneal shunt (Medical Encyclopedia)
  • Ventriculoperitoneal shunt - discharge (Medical Encyclopedia)

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