ICD-10 Code I69.342 – Monoplegia of Lower Limb Following Cerebral Infarction Affecting Left Dominant Side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.342 – Monoplegia of lower limb following cerebral infarction affecting left dominant side
What it is
This code identifies paralysis limited to one lower limb that remains after a cerebral infarction, with the left side affected in a dominant patient. Use it for a documented stroke sequela, not an acute event.
Clinical signs
Typical findings include persistent weakness or loss of movement in one leg, abnormal gait, and reduced functional use of the affected limb. Clinical features vary; refer to documentation.
When to use this code
Use I69.342 when the record clearly links the monoplegia to a prior cerebral infarction and specifies left dominant-side involvement. It fits follow-up or chronic care visits addressing residual deficits after stroke. If the side, dominance, or stroke relationship is unclear, check documentation.
Do not use for
Do not use this code for acute ischemic stroke, generalized paralysis, or weakness without a documented infarction sequela. Do not use it if the affected side or dominance is not confirmed.
Coding tip
Confirm that the provider documents both the residual monoplegia and the prior cerebral infarction before assigning this sequela code.