ICD-10 Code I69.049 – Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting unspecified side (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I69.049 – Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting unspecified side
What it is
This code identifies persistent paralysis or marked weakness of one lower limb after a nontraumatic subarachnoid hemorrhage, when the affected side is not documented. It is a late effect code, so you report the residual deficit rather than the acute hemorrhage.
Clinical signs
Typical findings include unilateral lower-limb weakness, reduced motor control, or inability to move one leg normally after the hemorrhage. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly links the monoplegia to a prior nontraumatic subarachnoid hemorrhage and the provider documents no laterality. You should apply it for ongoing residual deficits seen in follow-up or rehabilitation notes. If the acute hemorrhage is still being treated, code the active condition instead.
Do not use for
Do not use this code for monoplegia caused by trauma, stroke types other than nontraumatic subarachnoid hemorrhage, or when the affected side is documented. Check documentation.
Coding tip
Verify that the deficit is a residual effect and that the hemorrhage history is documented before assigning the sequela code.