ICD-10 Code I69.849 – Monoplegia of lower limb following other cerebrovascular disease affecting unspecified side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.849 – Monoplegia of lower limb following other cerebrovascular disease affecting unspecified side
What it is
I69.849 identifies monoplegia of one lower limb that occurs as a late effect of another cerebrovascular disease, when the affected side is not documented. Use it for residual weakness or paralysis linked to prior brain or vascular injury.
Clinical signs
Typical findings include persistent weakness or paralysis limited to one leg, with reduced motor function after a cerebrovascular event. Clinical features vary; refer to documentation for laterality, severity, and whether the deficit is residual.
When to use this code
Use this code when the record clearly states monoplegia of a lower limb as a sequela of other cerebrovascular disease and does not specify right or left side. It is appropriate for follow-up visits documenting ongoing neurologic deficit after the original event. Check documentation if the cause is unclear or the deficit is transient.
Do not use for
Do not use this code for acute stroke, unspecified hemiplegia, or lower-limb weakness without a documented cerebrovascular cause. If the side is documented, choose the more specific code.
Coding tip
Verify that the chart links the monoplegia to a prior cerebrovascular condition and that laterality is truly unspecified before assigning I69.849.