Diagnosis Code G91.9
Information for Medical Professionals
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.
- 331.4 - Obstructiv hydrocephalus (approximate) Approximate Flag
The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
- Acquired hydrocephalus
- Arrested hydrocephalus
- External hydrocephalus
- Hereditary degenerative disease of central nervous system
- Hydrocephalus with anomaly of aqueduct of Sylvius
- Internal hydrocephalus
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
- 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)