ICD-10 Code I69.842 – Monoplegia of lower limb following other cerebrovascular disease affecting left dominant side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.842 – Monoplegia of lower limb following other cerebrovascular disease affecting left dominant side
What it is
This code identifies weakness or paralysis affecting one lower limb due to a prior cerebrovascular disease. It specifies the left side in a patient whose left side is dominant.
Clinical signs
Clinical features vary; refer to documentation. You may see persistent one-sided leg weakness, reduced movement, abnormal gait, or need for assistive support after a cerebrovascular event.
When to use this code
Use this code when the record clearly links monoplegia of the left lower limb to a previous cerebrovascular disease and notes left dominance. It is appropriate for residual deficits, not for an acute stroke. Check that the provider documents laterality and dominant side.
Do not use for
Do not use it for acute cerebrovascular disease, generalized weakness, or paralysis from another cause. If the chart does not support the specific residual deficit or dominant-side detail, check documentation.
Coding tip
Confirm the residual deficit, the affected limb, and dominance in the note before assigning I69.842.