I69.334

HCC Category Mapping

What This Code Means

This code describes weakness or paralysis of one arm on the left side of the body that resulted from a previous stroke (cerebral infarction). The left side is the non-dominant side, meaning the person is right-handed.

Coding Tips

• •Verify documentation specifies monoplegia (single limb paralysis) of the upper limb and confirm the stroke was a cerebral infarction, not hemorrhage or other type
• •Ensure the left side is documented as non-dominant; if dominance is not specified, query the provider before coding, as this affects code selection (I69.333 is for dominant side)

Clinical Significance

Monoplegia of the upper limb as a sequela of a cerebral infarction (ischemic stroke) represents a chronic neurological deficit that significantly impacts the patient's functional status and ongoing care needs. Upper limb monoplegia affects the patient's ability to perform fine motor tasks, self-care activities, and may require occupational therapy and adaptive equipment. Accurate capture of this sequela is important for risk adjustment as it reflects ongoing neurological impairment requiring continued medical management and rehabilitation services.

Documentation Requirements

• ✓Documentation of prior cerebral infarction (stroke) as the causative event with clear causal linkage to the current deficit
• ✓Confirmation that this is a sequela (late effect), not an acute or current cerebrovascular event
• ✓Documentation that paralysis or weakness is isolated to one upper extremity (arm)
• ✓Current functional status of the affected upper limb including strength assessment
• ✓Documentation of which side is affected (right or left)
• ✓Documentation of patient's hand dominance to determine dominant vs non-dominant classification
• ✓Current treatment plan including rehabilitation services, medications, and adaptive equipment
• ✓Assessment that the condition is being actively monitored or managed during the encounter

Commonly Confused Codes