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ICD-10-CM Current in FY 2027

G91.4

Hydrocephalus in diseases classified elsewhere

Release
FY 2027
Effective
Official source (opens in a new tab)

Hierarchy

Where G91.4 sits in the official hierarchy. Each level is the code it is classified under.

  1. G91 Parent Hydrocephalus
  2. G91.4 This code Hydrocephalus in diseases classified elsewhere

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Includes

acquired hydrocephalus

Inherited from G91 — Hydrocephalus

Excludes1

Arnold-Chiari syndrome with hydrocephalus ( Q07 .-)

Inherited from G91 — Hydrocephalus

Excludes1

congenital hydrocephalus ( Q03 .-)

Inherited from G91 — Hydrocephalus

Excludes1

spina bifida with hydrocephalus ( Q05 .-)

Inherited from G91 — Hydrocephalus

Excludes1

hydrocephalus due to congenital toxoplasmosis ( P37.1 )

Code First

underlying condition, such as:

Code First

congenital syphilis ( A50.4- )

Code First

neoplasm (C00-D49)

Code First

plasminogen deficiency ( E88.02 )

Version History

How G91.4 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Hydrocephalus in diseases classified elsewhere

  2. FY 2026 Effective

    Unchanged

    Hydrocephalus in diseases classified elsewhere

Related Codes

Other codes under G91

Codes whose official notes reference G91.4

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release
FY 2027
Effective
Source file
icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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