ICD-10-CM 2027
ICD-10 code for toe s blister
From the official ICD-10-CM alphabetic index entry “Blister (nonthermal) › toe (s)”. Page updated September 29, 2026.
About coding toe s blister
The ICD-10-CM code for toe s blister is S90.42 (Blister (nonthermal) of toe). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on S90.42.
Within S90.4 (other superficial injuries of toe), S90.42 is specifically for Blister (nonthermal) of toe. Related codes cover abrasion of toe (S90.41), external constriction of toe (S90.44), superficial foreign body of toe (S90.45), insect bite (nonvenomous) of toe (S90.46) and other superficial bite of toe (S90.47).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific toe s blister codes (official index)
- great S90.42 — Blister (nonthermal) of toe
Common questions about toe s blister ICD-10 codes
What is the ICD-10 code for toe s blister?
- S90.42 — Blister (nonthermal) of toe (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: S90.42.
What is the ICD-10 code for great toe s blister?
- S90.42 — Blister (nonthermal) of toe (header code; choose a more specific subcode).
Is S90.42 billable?
- No. S90.42 is a header code. Report one of its more specific subcodes instead.