ICD-10 Code I69.942 – Monoplegia of lower limb following unspecified cerebrovascular disease affecting left dominant side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.942 – Monoplegia of lower limb following unspecified cerebrovascular disease affecting left dominant side
What it is
This code identifies paralysis or severe weakness affecting one lower limb after an unspecified cerebrovascular disease. It applies when the left side is the dominant side and the condition is a late effect of prior stroke-like disease.
Clinical signs
Expected findings include persistent one-leg weakness, impaired gait, or loss of motor control on the affected side. Clinical features vary; refer to documentation for the exact neurologic deficit and laterality.
When to use this code
Use this code when the record links current monoplegia of the lower limb to a past unspecified cerebrovascular disease. The documentation should identify the left dominant side and describe the deficit as a sequela, not an acute event. If the causal stroke type is known, check whether a more specific aftercare code applies.
Do not use for
Do not use it for acute stroke, transient ischemic attack, or weakness without documented monoplegia. Check documentation if the side, dominance, or cerebrovascular cause is unclear.
Coding tip
Confirm that the note states a residual deficit from prior cerebrovascular disease and supports left-dominant laterality before assigning I69.942.