Q07.0 Arnold-Chiari syndrome

The ICD-10-CM code for Arnold-Chiari syndrome is Q07.0 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

17: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Section

Q00-Q07: Congenital malformations of the nervous system (Q00-Q07)

Category Q07

8 codes (6 billable)

FY2026 Status

Stable since FY2024

Inclusion Terms

• Arnold-Chiari syndrome, type II

Official Coding Guidelines

POA indicator for congenital conditions/anomalies and Q00-Q99 exception

Congenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool