ICD-10 Code I69.349 – Monoplegia of lower limb following cerebral infarction affecting unspecified side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.349 – Monoplegia of lower limb following cerebral infarction affecting unspecified side
What it is
This code identifies a persistent one-sided paralysis or severe weakness of a lower limb that remains after a cerebral infarction, when the affected side is not documented. It reflects a late effect of stroke, not the acute event.
Clinical signs
Typical findings include marked weakness or loss of voluntary movement in one leg, with reduced functional use after a prior stroke. Clinical features vary; refer to documentation.
When to use this code
Use I69.349 when the record clearly links the lower-limb monoplegia to a previous cerebral infarction and the side is not specified. It is appropriate for residual deficits noted during follow-up, rehabilitation, or chronic care visits. Do not use it for an acute stroke admission.
Do not use for
Do not use this code for weakness without a documented stroke cause, or when the affected side is documented elsewhere. Check documentation if the deficit is due to another neurologic condition.
Coding tip
Code the residual deficit only when the provider documents it as a sequela of cerebral infarction.