ICD-10 CM Code S04.21
S04.21
Injury of trochlear nerve, right side
Inclusion Term
- Injury of 4th cranial nerve
- The selection of side should be based on the side of the body being affected
7th Character
- The appropriate 7th character is to be added to each code from category S04
- A - initial encounter
- D - subsequent encounter
- S - sequela
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