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ICDMine.com › Browse ICD-10-CM Codes › Ch. 6: Diseases of the nervous system (G00-G99) › Other disorders of the nervous system (G89-G99) › G91

G91Hydrocephalus

ICD-10-CM category (non-billable header) code — part of Other disorders of the nervous system (G89-G99)

Code Details

Billable	No — use a more specific child code
Chapter	Chapter 6: Diseases of the nervous system (G00-G99)
Section	Other disorders of the nervous system (G89-G99)

Coding Notes

Includes

acquired hydrocephalus

Excludes1 (never code both together)

Arnold-Chiari syndrome with hydrocephalus (Q07.-)
congenital hydrocephalus (Q03.-)
spina bifida with hydrocephalus (Q05.-)

Subcategories (7)

G91.0 Communicating hydrocephalus
G91.1 Obstructive hydrocephalus
G91.2 (Idiopathic) normal pressure hydrocephalus
G91.3 Post-traumatic hydrocephalus, unspecified
G91.4 Hydrocephalus in diseases classified elsewhere
G91.8 Other hydrocephalus
G91.9 Hydrocephalus, unspecified

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