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Q07.0

Arnold-Chiari syndrome

Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 5 never code together
Q07code
Excludes2
  • congenital central alveolar hypoventilation syndrome (G47.35)G47.35
  • familial dysautonomia [Riley-Day] (G90.1)G90.1
  • neurofibromatosis (nonmalignant) (Q85.0-)Q85.0-
Q07.0code
Excludes1

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 1
Q07.0code
Inclusion terms
  • Arnold-Chiari syndrome, type II
Index entries leading here filed at null

No alphabetic index entry points at this code.

Alongside this code 2 same parent — Q07
Q07.8 Other specified congenital malformations of nervous system Q07.9 Congenital malformation of nervous system, unspecified
Subordinate codes 4
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
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
no
Code set
FY2026
Parent
Q07
Block
Q00-Q07
Siblings
2
Subordinate
4

Present FY2024–FY2027.