Q07.8 Other specified congenital malformations of nervous system

The ICD-10-CM code for Other specified congenital malformations of nervous system is Q07.8 (FY2026). It is a billable, claim-ready diagnosis code.

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

Also Known As

ICD-10-CM Alphabetic Index entries that lead to Q07.8:

• Gunn's syndrome
• Marcus Gunn's syndrome
• Jaw-winking phenomenon or syndrome
• Anomaly, anomalous (congenital) (unspecified type) › acoustic nerve
• Agenesis › nerve
• Agenesis › nervous system, part NEC
• Accessory (congenital) › nervous system, part NEC
• Agenesis › nuclear

Inclusion Terms

• Agenesis of nerve
• Displacement of brachial plexus
• Jaw-winking syndrome
• Marcus Gunn's syndrome

U.S. Hospital Utilization

• An estimated 615 U.S. inpatient stays in 2023 included Q07.8 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

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
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)