ICD-10 Code I69.33 – Monoplegia of Upper Limb Following Cerebral Infarction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.33 – Monoplegia of upper limb following cerebral infarction
What it is
I69.33 identifies weakness or paralysis affecting one upper limb as a late effect of a prior cerebral infarction, or stroke. Use it when the deficit remains after the acute event has resolved.
Clinical signs
Typical findings include reduced voluntary movement, unilateral arm weakness, and impaired function of the affected upper extremity after stroke. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record links the upper-limb monoplegia to a previous cerebral infarction and the condition is being treated or assessed as a residual deficit. It fits follow-up visits, rehabilitation encounters, and ongoing neurologic care. Do not use it for the acute stroke episode.
Do not use for
Do not use this code if the arm weakness is unrelated to cerebral infarction or if documentation does not show a residual effect. Check documentation.
Coding tip
Code the residual deficit only when the provider clearly documents it as due to a prior cerebral infarction.