ICD-10 Code G81.1 – Spastic hemiplegia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G81.1 – Spastic hemiplegia
What it is
G81.1 identifies spastic hemiplegia, a pattern of paralysis or marked weakness affecting one side of the body with increased muscle tone. Use it when documentation clearly states spastic hemiplegia.
Clinical signs
Typical findings include unilateral weakness, stiffness, hypertonia, and reduced voluntary movement on one side. Clinical features vary; refer to documentation, especially when the record distinguishes spasticity from other hemiplegic forms.
When to use this code
Use G81.1 when the provider documents spastic hemiplegia as the diagnosis, whether congenital or acquired. It may also fit follow-up visits when the condition is ongoing and still clinically relevant. Check documentation if the type of hemiplegia is not specified.
Do not use for
Do not use this code for hemiplegia without spasticity, generalized paralysis, or weakness alone. If the record is unclear, check documentation rather than assuming spastic hemiplegia.
Coding tip
Code the documented hemiplegia type exactly as written; if spasticity is not stated, do not assign G81.1.