ICD-10-CM Code G91.4
Hydrocephalus in diseases classified elsewhere
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.Manifestation Code
Certain ICD-10-CM codes identify an underlying condition known as an etiology code. Conditions that arise as a result of an underlying condition (etiology), are referred to as Manifestations. In ICD-10-CM, etiology codes must be coded first, followed by the manifestation codes. When a condition requires etiology and manifestation codes, there is a "use additional code" note following the etiology code and a "code first" note following the manifestation code.G91.4 is a billable ICD code used to specify a diagnosis of hydrocephalus in diseases classified elsewhere. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
The ICD code G91 is used to code Hydrocephalus
Hydrocephalus (from Greek hydro-, meaning "water", and kephalos, meaning "head") is a rare medical condition in which there is an abnormal accumulation of cerebrospinal fluid (CSF) in the brain. This causes increased intracranial pressure inside the skull and may cause progressive enlargement of the head if it occurs in childhood, potentially causing convulsion, tunnel vision, and mental disability. It was once informally called "Water on the brain."
Specialty: | Neurosurgery |
MeSH Codes: | D006849, D006849, D006849, D006849 |
ICD 9 Codes: | 331.3, 331.4, 741.0, 742.3 |
Hydrocephalus seen on a CT scan of the brain. The black areas in the middle of the brain are abnormally large and filled with fluid.
Coding Notes for G91.4 Info for medical coders on how to properly use this ICD-10 code
- codeFirst:
- Underlying condition, such as:
- Congenital syphilis See code A50.4-
- Neoplasm See Section C00-D49
-
Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here." - Hydrocephalus due to congenital toxoplasmosis - instead, use code P37.1
MS-DRG Mapping
- DRG Group #056-057 - Degenerative nervous system disorders with MCC.
- DRG Group #056-057 - Degenerative nervous system disorders without MCC.
ICD-10-CM Alphabetical Index References for 'G91.4 - Hydrocephalus in diseases classified elsewhere'
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code G91.4. Click on any term below to browse the alphabetical index.
Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code G91.4 and a single ICD9 code, 331.7 is an approximate match for comparison and conversion purposes.
Parent Code: G91 - Hydrocephalus