2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Hereditary And Degenerative Diseases Of The Central Nervous System 330-338 > Other Cerebral Degenerations 331.* > 2006 ICD-9-CM Diagnosis 331.4 Obstructive hydrocephalus View the most recent version of ICD-9-CM 331.4 331.4 is a specific code that can be used to specify a diagnosis 331.4 contains 9 index entries View the ICD-9-CM Volume 1 331.* hierarchy Alternate Terminology Acquired hydrocephalus NOS 331.4 Excludes congenital hydrocephalus (741.0, 742.3)  Index entries containing 331.4: Hydrocephalus (acquired) (external) (internal) (malignant) (noncommunicating) (obstructive) (recurrent) 331.4 aqueduct of Sylvius stricture 742.3 with spina bifida (see also Spina bifida) 741.0 chronic 742.3 with spina bifida (see also Spina bifida) 741.0 communicating 331.3 congenital (external) (internal) 742.3 with spina bifida (see also Spina bifida) 741.0 due to stricture of aqueduct of Sylvius 742.3 with spina bifida (see also Spina bifida) 741.0 toxoplasmosis (congenital) 771.2 fetal affecting management of pregnancy 655.0 foramen Magendie block (acquired) 331.3 congenital 742.3 with spina bifida (see also Spina bifida) 741.0 newborn 742.3 with spina bifida (see also Spina bifida) 741.0 otitic 348.2 syphilitic, congenital 090.49 tuberculous (see also Tuberculosis) 013.8 Hydrops 782.3 meningeal NEC 331.4 Macrohydrocephalus (see also Hydrocephalus) 331.4 Obstruction, obstructed, obstructive aqueduct of Sylvius 331.4 congenital 742.3 with spina bifida (see also Spina bifida) 741.0 Occlusion aqueduct of Sylvius 331.4 congenital 742.3 with spina bifida (see also Spina bifida) 741.0 ventricle (brain) NEC 331.4 Stenosis (cicatricial) - see also Stricture aqueduct of Sylvius (congenital) 742.3 acquired 331.4 Stricture (see also Stenosis) 799.89 aqueduct of Sylvius (congenital) 742.3 acquired 331.4