ICD-10 Code I69.949 – Monoplegia of lower limb following unspecified cerebrovascular disease affecting unspecified side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.949 – Monoplegia of lower limb following unspecified cerebrovascular disease affecting unspecified side
What it is
This code identifies paralysis affecting one lower limb that occurs after a cerebrovascular disease, when the side is not specified. It is a late effect of prior stroke or similar vascular brain injury, not an acute event.
Clinical signs
Typical findings include marked weakness or complete loss of movement in one leg, with reduced functional use on the affected side. Clinical features vary; refer to documentation for the exact neurologic deficits and laterality.
When to use this code
Use I69.949 when the record documents monoplegia of a lower limb as a residual condition from a previous cerebrovascular disease and does not specify right or left side. This code fits follow-up care, rehabilitation, or long-term neurologic assessment after the original event.
Use the code only when the provider clearly links the leg paralysis to the prior cerebrovascular disease. If the chart describes acute stroke symptoms or another cause of weakness, check documentation before assigning this code.
Do not use for
Do not use this code for acute stroke, transient ischemic attack, or generalized weakness without documented monoplegia. Do not use it if the affected side is known and another code is required.
Coding tip
Confirm that the residual deficit is from a prior cerebrovascular disease and that laterality is unspecified before coding.