G81 Hemiplegia and hemiparesis

The ICD-10-CM code for Hemiplegia and hemiparesis is G81 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

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

Section

G80-G83: Cerebral palsy and other paralytic syndromes (G80-G83)

Category G81

19 codes (15 billable)

FY2026 Status

Stable since FY2024

Official Coding Guidelines

Dominant/nondominant defaults for hemiplegia/monoplegia coding

Codes from category G81, Hemiplegia and hemiparesis, and subcategories G83.1, Monoplegia of lower limb, G83.2, Monoplegia of upper limb, and G83.3, Monoplegia, unspecified, identify whether the dominant or nondominant side is affected. Should the affected side be documented, but not specified as dominant or nondominant, and the classification system does not indicate a default, code selection is as follows: • For ambidextrous patients, the default should be dominant. • If the left side is affected, the default is non-dominant. • If the right side is affected, the default is dominant.

Dominant/nondominant side (TOC entry)

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