G46.3 Brain stem stroke syndrome

The ICD-10-CM code for Brain stem stroke syndrome is G46.3 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

6: Diseases of the nervous system (G00-G99)

Section

G40-G47: Episodic and paroxysmal disorders (G40-G47)

Category G46

10 codes (9 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G46.3:

• Céstan (-Chenais) paralysis or syndrome
• Benedikt's paralysis or syndrome
• Gubler-Millard paralysis or syndrome
• Foville's (peduncular) disease or syndrome
• Claude's disease or syndrome
• Weber-Gubler syndrome
• Millard-Gubler (-Foville) paralysis or syndrome
• Wallenberg's disease or syndrome

Inclusion Terms

• Benedikt syndrome
• Claude syndrome
• Foville syndrome
• Millard-Gubler syndrome
• Wallenberg syndrome
• Weber syndrome

U.S. Hospital Utilization

• An estimated 1,570 U.S. inpatient stays in 2023 included G46.3 among the documented diagnoses.
• 95 stays listed it as the principal diagnosis.

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

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

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)