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ICD-10-CM Current in FY 2027

G91.2

(Idiopathic) normal pressure hydrocephalus

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

Hierarchy

Where G91.2 sits in the official hierarchy. Each level is the code it is classified under.

  1. G91 Parent Hydrocephalus
  2. G91.2 This code (Idiopathic) normal pressure hydrocephalus

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

Inclusion Terms

Normal pressure hydrocephalus NOS

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

Version History

How G91.2 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    (Idiopathic) normal pressure hydrocephalus

  2. FY 2026 Effective

    Unchanged

    (Idiopathic) normal pressure hydrocephalus

Related Codes

Other codes under G91

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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