ICD-10 CM Code S20.421
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S20 Superficial injury of thorax
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S20.4 Other and unspecified superficial injuries of back wall of thorax
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S20.42 Blister (nonthermal) of back wall of thorax
S20.421
Blister (nonthermal) of right back wall of thorax
7th Character
- The appropriate 7th character is to be added to each code from category S20
- A - initial encounter
- D - subsequent encounter
- S - sequela
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