S90.42 Blister (nonthermal) of toe

Non-billable header with 6 child codes.

Applies from S90 Superficial injury of ankle, foot and toes

7th character note

• The appropriate 7th character is to be added to each code from category S90

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Codes under S90.42

• S90.421 Blister (nonthermal), right great toe
• S90.422 Blister (nonthermal), left great toe
• S90.423 Blister (nonthermal), unspecified great toe
• S90.424 Blister (nonthermal), right lesser toe(s)
• S90.425 Blister (nonthermal), left lesser toe(s)
• S90.426 Blister (nonthermal), unspecified lesser toe(s)

Code annotations containing back-references to S90.42

Back-references to S90

• Type 2 Excludes: S80 Superficial injury of knee and lower leg ("superficial injury of ankle and foot (S90.-)")

Diagnosis Index entries for S90.42

• Blister (nonthermal) › toe (s)
• Blister (nonthermal) › toe (s) › great

Nearby codes

• S90.415S Abrasion, left lesser toe(s), sequela
• S90.416 Abrasion, unspecified lesser toe(s)
• S90.416A Abrasion, unspecified lesser toe(s), initial encounter
• S90.416D Abrasion, unspecified lesser toe(s), subsequent encounter
• S90.416S Abrasion, unspecified lesser toe(s), sequela
• S90.42 Blister (nonthermal) of toe (this code)
• S90.421 Blister (nonthermal), right great toe
• S90.421A Blister (nonthermal), right great toe, initial encounter
• S90.421D Blister (nonthermal), right great toe, subsequent encounter
• S90.421S Blister (nonthermal), right great toe, sequela
• S90.422 Blister (nonthermal), left great toe