ICD-10 Code G81.9 – Hemiplegia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G81.9 – Hemiplegia, unspecified
What it is
G81.9 identifies hemiplegia affecting one side of the body when the documentation does not specify the cause, type, or whether it is dominant or nondominant side. Use it when the record clearly states hemiplegia but leaves details unspecified.
Clinical signs
Typical findings include weakness or paralysis on one side of the body, often involving the arm, leg, and sometimes the face. Clinical features vary; refer to documentation for the exact pattern, cause, and severity.
When to use this code
Use G81.9 when the provider documents hemiplegia without further detail, such as after stroke, brain injury, or another neurologic event, and no more specific code is supported. It is appropriate when laterality, dominance, or etiology is not recorded. Check documentation if the chart suggests a more specific hemiplegia code.
Do not use for
Do not use this code for hemiparesis, paraplegia, or generalized weakness. Also avoid it when the record specifies flaccid, spastic, dominant, nondominant, or other defined hemiplegia types.
Coding tip
If the note gives any laterality or type detail, code to the most specific hemiplegia option instead of G81.9.