1. ICD-10-CM Codes
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2. G00-G99
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3. G89-G99
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4. G91-
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5. 2023 ICD-10-CM Diagnosis Code G91

2023 ICD-10-CM Diagnosis Code G91

Hydrocephalus

2016 2017 2018 2019 2020 2021 2022 2023 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 2023 edition of ICD-10-CM G91 became effective on October 1, 2022.
• This is the American ICD-10-CM version of G91 - other international versions of ICD-10 G91 may differ.

• (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
  • 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. Medicine and rehabilitation therapy can also help.
• 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
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change

• Type 1 Excludes: Q03
  ICD-10-CM Diagnosis Code Q03

  Congenital hydrocephalus

  2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code

  Includes

  • hydrocephalus in newborn

  Type 1 Excludes

  • Arnold-Chiari syndrome, type II (Q07.0-)
  • acquired hydrocephalus (G91.-)
  • hydrocephalus due to congenital toxoplasmosis (P37.1)
  • hydrocephalus with spina bifida (Q05.0-Q05.4)

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.