G11.4 Hereditary spastic paraplegia

The ICD-10-CM code for Hereditary spastic paraplegia is G11.4 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

G10-G14: Systemic atrophies primarily affecting the central nervous system (G10-G14)

Category G11

13 codes (11 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G11.4:

• Ataxia, ataxy, ataxic › spastic hereditary
• Paraplegia (lower) › familial spastic
• Paraplegia (lower) › hereditary, spastic
• Paralysis, paralytic (complete) (incomplete) › spastic › familial
• Paralysis, paralytic (complete) (incomplete) › spastic › hereditary
• Paralysis, paralytic (complete) (incomplete) › familial (recurrent) (periodic) › spastic
• Ataxia, ataxy, ataxic › hereditary › spastic
• Paraplegia (lower) › spastic › hereditary

U.S. Hospital Utilization

• An estimated 2,430 U.S. inpatient stays in 2023 included G11.4 among the documented diagnoses.
• 110 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)