ICD-10 Code I69.34 – Monoplegia of lower limb following cerebral infarction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.34 – Monoplegia of lower limb following cerebral infarction
What it is
I69.34 identifies weakness or paralysis affecting one lower limb as a late effect of a prior cerebral infarction, or stroke. Use it when the deficit is documented as resulting from the old infarct.
Clinical signs
Typical findings include persistent one-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 links monoplegia of a lower limb to a previous cerebral infarction and the condition is being managed as a sequela. You should code the residual deficit, not the acute stroke, when the infarction is no longer active. Check documentation for laterality and whether the weakness is complete or incomplete.
Do not use for
Do not use it for acute cerebral infarction or for leg weakness from another cause, such as trauma or peripheral nerve disease. Check documentation if the residual deficit is not clearly tied to the old stroke.
Coding tip
Verify that the provider documents a causal link between the prior infarction and the lower-limb monoplegia before assigning I69.34.