Alphabetic Index · main term

Macrohydrocephalus

FY2027Index: Ma /Alphabetic Index

Macrohydrocephalus is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). It is a cross-reference: the Index sends you to Hydrocephalus, which lists G91.9. Confirm the code in the Tabular List before you report it.

Where the Index sends you

see Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent)

G91.9BillableExcludes1Excludes2

Hydrocephalus, unspecified

Open G91.9

First-level subterms 16

aqueduct Sylvius strictureQ03.0
causing disproportionO33.6
communicatingG91.0
congenital (external) (internal)Q03.9
due to toxoplasmosis (congenital)P37.1
foramen Magendie block (acquired)G91.1
in (due to)
newbornQ03.9
noncommunicatingG91.1
normal pressureG91.2

See all 33 subterms