Diseases of the nervous system
Other disorders of the nervous system
2021 ICD-10-CM Diagnosis Code G91.9
2021 ICD-10-CM Diagnosis Code G91.9
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- G91.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2021 edition of ICD-10-CM G91.9 became effective on October 1, 2020.
- This is the American ICD-10-CM version of G91.9 - other international versions of ICD-10 G91.9 may differ.
The following code(s) above G91.9
contain annotation back-references
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to G91.9
- Acquired hydrocephalus
- Hydrocephalus, acquired
ICD-10-CM G91.9 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
- (hye-dro-sef-uh-lus) the abnormal buildup of cerebrospinal fluid in the ventricles of the brain.
- A disorder characterized by an abnormal increase of cerebrospinal fluid in the ventricles of the brain.
- Excessive accumulation of cerebrospinal fluid within the cranium which may be a congenital or acquired disorder; hydrocephalus ex-vacuo refers to ventricular dilation that occurs as a result of brain substance loss from cerebral infarction and other conditions.
- Excessive accumulation of cerebrospinal fluid within the cranium which may be associated with dilation of cerebral ventricles, intracranial hypertension; headache; lethargy; urinary incontinence; and ataxia.
- Excessive gathering of cerebrospinal fluid within the head bone
- 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.there are two kinds of hydrocephalus. Congenital hydrocephalus is 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. Acquired hydrocephalus can occur at any age. Causes can include head injuries, strokes, infections, tumors and bleeding in the brain. Symptoms of acquired hydrocephalus can include
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. Medicine and rehabilitation therapy can also help.
- vomiting and nausea
- blurry vision
- balance problems
- bladder control problems
- thinking and memory problems
- The abnormal buildup of cerebrospinal fluid in the ventricles of the brain.
- 056 Degenerative nervous system disorders with mcc
- 057 Degenerative nervous system disorders without mcc
Convert G91.9 to ICD-9-CM
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent) G91.9
ICD-10-CM Codes Adjacent To G91.9
Complex regional pain syndrome I of other specified site
Other disorders of autonomic nervous system
Disorder of the autonomic nervous system, unspecified
(Idiopathic) normal pressure hydrocephalus
Post-traumatic hydrocephalus, unspecified
Hydrocephalus in diseases classified elsewhere
Other disorders of brain
Anoxic brain damage, not elsewhere classified
Benign intracranial hypertension
Postviral fatigue syndrome
Other and unspecified encephalopathy
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.