G91Non-billable (header)

Hydrocephalus

Related Codes· Other disorders of the nervous system (G89-G99)

G89Pain, not elsewhere classifiedG90Disorders of autonomic nervous systemG92Toxic encephalopathyG93Other disorders of brain

Sub-codes of G91(7)

G91 is a non-billable header. Select a sub-code to bill.

G91.0Communicating hydrocephalus✓ BillableG91.1Obstructive hydrocephalus✓ BillableG91.2(Idiopathic) normal pressure hydrocephalus✓ BillableG91.3Post-traumatic hydrocephalus, unspecified✓ BillableG91.4Hydrocephalus in diseases classified elsewhere✓ BillableG91.8Other hydrocephalus✓ BillableG91.9Hydrocephalus, unspecified✓ Billable

✓ Includes

  • •acquired hydrocephalus

✗ Excludes 1(Not coded here)

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

Code Hierarchy

┌6Diseases of the nervous system (G00-G99)├G89-G99Other disorders of the nervous system (G89-G99)├G91Hydrocephalus
└G91Hydrocephalus

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