Diseases of the nervous system
Other disorders of the nervous system
2021 ICD-10-CM Diagnosis Code G91
2021 ICD-10-CM Diagnosis Code G91
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- G91 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2021 edition of ICD-10-CM G91 became effective on October 1, 2020.
- This is the American ICD-10-CM version of G91 - other international versions of ICD-10 G91 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G91. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- Arnold-Chiari syndrome with hydrocephalus (
ICD-10-CM Diagnosis Code Q07
- Q07 Other congenital malformations of nervous sys...
- Q07.0 Arnold-Chiari syndrome
- Q07.00 Arnold-Chiari syndrome without spina bifida o...
- Q07.01 …… with spina bifida
- Q07.02 …… with hydrocephalus
- Q07.03 Arnold-Chiari syndrome with spina bifida and ...
- Q07.8 Other specified congenital malformations of n...
- Q07.9 Congenital malformation of nervous system, un...
- congenital hydrocephalus (
ICD-10-CM Diagnosis Code Q03
- Q03 Congenital hydrocephalus
- Q03.0 Malformations of aqueduct of Sylvius
- Q03.1 Atresia of foramina of Magendie and Luschka
- Q03.8 Other congenital hydrocephalus
- Q03.9 Congenital hydrocephalus, unspecified
- spina bifida with hydrocephalus (
ICD-10-CM Diagnosis Code Q05
- Q05 Spina bifida
- Q05.0 Cervical spina bifida with hydrocephalus
- Q05.1 Thoracic spina bifida with hydrocephalus
- Q05.2 Lumbar spina bifida with hydrocephalus
- Q05.3 Sacral spina bifida with hydrocephalus
- Q05.4 Unspecified spina bifida with hydrocephalus
- Q05.5 Cervical spina bifida without hydrocephalus
- Q05.6 Thoracic spina bifida without hydrocephalus
- Q05.7 Lumbar spina bifida without hydrocephalus
- Q05.8 Sacral spina bifida without hydrocephalus
- Q05.9 Spina bifida, unspecified
"Includes" further defines, or give examples of, the content of the code or category.
The following code(s) above G91
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
- (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
- Hydrocephalus that results from head trauma, brain tumors, intracranial hemorrhage, or meningitis.
- The abnormal buildup of cerebrospinal fluid in the ventricles of the brain.
- 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
Code annotations containing back-references to G91:
ICD-10-CM Codes Adjacent To G91
Complex regional pain syndrome I of unspecified upper limb
Complex regional pain syndrome I of lower limb
Complex regional pain syndrome I of right lower limb
Complex regional pain syndrome I of left lower limb
Complex regional pain syndrome I of unspecified lower limb
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
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.