Q07.0 Arnold-Chiari syndrome

Non-billable header with 4 child codes.

Applicable to

• Arnold-Chiari syndrome, type II

Excludes1 (never code together)

• Arnold-Chiari syndrome, type III (Q01.-)
• Arnold-Chiari syndrome, type IV (Q04.8)

Applies from Q07 Other congenital malformations of nervous system

Excludes2 (not included here)

• congenital central alveolar hypoventilation syndrome (G47.35)
• familial dysautonomia [Riley-Day] (G90.1)
• neurofibromatosis (nonmalignant) (Q85.0-)

Codes under Q07.0

• Q07.00 Arnold-Chiari syndrome without spina bifida or hydrocephalus
• Q07.01 Arnold-Chiari syndrome with spina bifida
• Q07.02 Arnold-Chiari syndrome with hydrocephalus
• Q07.03 Arnold-Chiari syndrome with spina bifida and hydrocephalus

Code annotations containing back-references to Q07.0

Back-references to Q07.0

• Type 1 Excludes: Q03 Congenital hydrocephalus ("Arnold-Chiari syndrome, type II (Q07.0-)")
• Type 1 Excludes: Q05 Spina bifida ("Arnold-Chiari syndrome, type II (Q07.0-)")

Back-references to Q07

• Type 1 Excludes: G91 Hydrocephalus ("Arnold-Chiari syndrome with hydrocephalus (Q07.-)")

Nearby codes

• Q07 Other congenital malformations of nervous system
• Q07.0 Arnold-Chiari syndrome (this code)
• Q07.00 Arnold-Chiari syndrome without spina bifida or hydrocephalus
• Q07.01 Arnold-Chiari syndrome with spina bifida
• Q07.02 Arnold-Chiari syndrome with hydrocephalus
• Q07.03 Arnold-Chiari syndrome with spina bifida and hydrocephalus
• Q07.8 Other specified congenital malformations of nervous system