S04.21XA✓ Billable
Injury of trochlear nerve, right side, initial encounter
Code Hierarchy
┌19Injury, poisoning and certain other consequences of external causes (S00-T88)├S00-S09Injuries to the head (S00-S09)├S04Injury of cranial nerve
└S04.21XAInjury of trochlear nerve, right side, initial encounter
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