ICD-10 Code I69.343 – Monoplegia of lower limb following cerebral infarction affecting right non-dominant side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.343 – Monoplegia of lower limb following cerebral infarction affecting right non-dominant side
What it is
This code describes weakness or paralysis limited to one lower limb that remains after a cerebral infarction, or ischemic stroke. It specifies the right side and that the patient’s right side is non-dominant.
Clinical signs
Typical findings include persistent reduced movement, loss of strength, or complete inability to use the right leg after a prior stroke. Clinical features vary; refer to documentation for laterality and dominance.
When to use this code
Use this code when the record clearly links the lower-limb monoplegia to a previous cerebral infarction and identifies the affected side as right. You should also confirm that the right side is documented as non-dominant. If the chart does not support dominance or laterality, check documentation.
Do not use for
Do not use this code for monoplegia from causes other than cerebral infarction, or for generalized weakness without a documented stroke sequence. Do not assign it when the affected side or dominance is not documented.
Coding tip
Verify the stroke history, residual deficit, laterality, and dominance before coding I69.343.