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ICD-10-CM Diagnosis Codes →
section notes
19. Injury, poisoning and certain other consequences of external causes (S00-T88) →
section notes
S00-S09 Injuries to the head (S00-S09) →
section notes
S04 Injury of cranial nerve →
section notes
S04.2 Injury of trochlear nerve →
section notes
S04.21 Injury of trochlear nerve, right side →
section notes
S04.21XA   Injury of trochlear nerve, right side, initial encounter
S04.21XD   Injury of trochlear nerve, right side, subsequent encounter
S04.21XS   Injury of trochlear nerve, right side, sequela
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