ICD-10 Code I69.943 – Monoplegia of lower limb following unspecified cerebrovascular disease affecting right non-dominant side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.943 – Monoplegia of lower limb following unspecified cerebrovascular disease affecting right non-dominant side
What it is
This code identifies paralysis affecting one lower limb after an unspecified cerebrovascular disease, with right-sided involvement on the non-dominant side. It is a late effect code, so you use it for residual impairment rather than the acute stroke event.
Clinical signs
Typical findings include marked weakness or complete loss of movement in the right leg, often with abnormal gait, foot drag, or need for assistive devices. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly links the lower-limb monoplegia to a prior unspecified cerebrovascular disease and specifies the right non-dominant side. It is appropriate for persistent neurologic deficits documented as sequelae after the acute event has resolved. Check documentation if laterality, dominance, or cause is unclear.
Do not use for
Do not use this code for acute stroke, generalized weakness, or paralysis not documented as a cerebrovascular sequela. Do not assign it if the affected side or dominant status is not specified.
Coding tip
Verify that the provider documents both the residual monoplegia and the prior cerebrovascular cause before assigning I69.943.