S90.421⚠ Requires 7th Character
Blister (nonthermal), right great toe
⚠ 7th Character Required
The appropriate 7th character is to be added to each code from category S90
This code is not valid for billing without a 7th character. Append one of the following to S90.421:
Code Hierarchy
┌19Injury, poisoning and certain other consequences of external causes (S00-T88)├S90-S99Injuries to the ankle and foot (S90-S99)├S90Superficial injury of ankle, foot and toes
└S90.421Blister (nonthermal), right great toe
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