Not Valid for Submission
G91 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of hydrocephalus. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions.
Consider the following ICD-10 codes with a higher level of specificity:
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code G91:
Includes
IncludesThis note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- acquired hydrocephalus
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- Arnold-Chiari syndrome with hydrocephalus Q07
- congenital hydrocephalus Q03
- spina bifida with hydrocephalus Q05
Clinical Information
- DANDY WALKER SYNDROME-. a congenital abnormality of the central nervous system marked by failure of the midline structures of the cerebellum to develop dilation of the fourth ventricle and upward displacement of the transverse sinuses tentorium and torcula. clinical features include occipital bossing progressive head enlargement bulging of anterior fontanelle papilledema ataxia gait disturbances nystagmus and intellectual compromise. from menkes textbook of child neurology 5th ed pp294 5
- HYDROCEPHALUS-. 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.
- HYDROCEPHALUS NORMAL PRESSURE-. a form of compensated hydrocephalus characterized clinically by a slowly progressive gait disorder see gait disorders neurologic progressive intellectual decline and urinary incontinence. spinal fluid pressure tends to be in the high normal range. this condition may result from processes which interfere with the absorption of csf including subarachnoid hemorrhage chronic meningitis and other conditions. from adams et al. principles of neurology 6th ed pp631 3
- WALKER WARBURG SYNDROME-. rare autosomal recessive lissencephaly type 2 associated with congenital muscular dystrophy and eye anomalies e.g. retinal detachment; cataract; microphthalmos. it is often associated with additional brain malformations such as hydrocephaly and cerebellar hypoplasia and is the most severe form of the group of related syndromes alpha dystroglycanopathies with common congenital abnormalities in the brain eye and muscle development.
Code Classification
Code History
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
(First year ICD-10-CM implemented into the HIPAA code set) - FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021