S99: Other and unspecified injuries of ankle and foot
S99.9: Unspecified injury of ankle and foot

sevenChrNote
The appropriate 7th character is to be added to each code from subcategory S99.9

sevenChrDef
A: initial encounter
D: subsequent encounter
S: sequela
S99.91: Unspecified injury of ankle
S99.92: Unspecified injury of foot

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