ICD-10 Code I69.84 – Monoplegia of lower limb following other cerebrovascular disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.84 – Monoplegia of lower limb following other cerebrovascular disease
What it is
I69.84 identifies weakness or paralysis limited to one lower limb that remains after a cerebrovascular disease other than the conditions named in more specific post-stroke codes. Use it for a residual neurologic deficit, not an acute event.
Clinical signs
Typical findings include persistent one-sided leg weakness, reduced movement, abnormal gait, or need for assistive support. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents monoplegia of a lower limb as a late effect of prior cerebrovascular disease and the provider links the deficit to that history. It is appropriate for ongoing residual impairment at follow-up visits, rehabilitation encounters, or problem lists. Check documentation for laterality and whether the cause is captured by a more specific code.
Do not use for
Do not use it for acute stroke, transient weakness, or generalized hemiplegia. Do not use it if the chart does not clearly connect the leg deficit to prior cerebrovascular disease.
Coding tip
Confirm both the residual deficit and the causal cerebrovascular history in the note before assigning I69.84.