ICD-10 Code I69.331 – Monoplegia of Upper Limb Following Cerebral Infarction Affecting Right Dominant Side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.331 – Monoplegia of upper limb following cerebral infarction affecting right dominant side
What it is
This code identifies residual one-sided paralysis or severe weakness limited to the upper limb after a cerebral infarction, with the right side affected in a dominant patient. It describes a late effect of stroke, not the acute infarction itself.
Clinical signs
Typical documentation includes persistent loss of movement, marked weakness, or impaired control of the right arm after a prior ischemic stroke. Clinical features vary; refer to documentation for whether the deficit is complete or partial.
When to use this code
Use I69.331 when the provider documents monoplegia of the right upper limb as a sequela of cerebral infarction and notes the patient is right dominant. Apply it for ongoing post-stroke deficits during follow-up, rehabilitation, or long-term management. Do not use it for the initial stroke event.
Do not use for
Do not use this code for acute cerebral infarction, generalized hemiplegia, or weakness without a documented stroke sequela. Check documentation if the affected side, dominance, or cause is unclear.
Coding tip
Confirm both the stroke sequela and right-hand dominance in the record before assigning I69.331.