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ICD-10-CM 2027

ICD-10 code for arm upper blister

S40.82

Blister (nonthermal) of upper arm

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Blister (nonthermal) › arm (upper)”. Page updated September 29, 2026.

About coding arm upper blister

The ICD-10-CM code for arm upper blister is S40.82 (Blister (nonthermal) of upper arm).

Within S40.8 (other superficial injuries of upper arm), S40.82 is specifically for Blister (nonthermal) of upper arm. Related codes cover abrasion of upper arm (S40.81), external constriction of upper arm (S40.84), superficial foreign body of upper arm (S40.85), insect bite (nonvenomous) of upper arm (S40.86) and other superficial bite of upper arm (S40.87).

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.

Common questions about arm upper blister ICD-10 codes

What is the ICD-10 code for arm upper blister?

S40.82 — Blister (nonthermal) of upper arm (a header code; report a more specific subcode).

Is S40.82 billable?

No. S40.82 is a header code. Report one of its more specific subcodes instead.