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ICD-10-CM 2027

ICD-10 code for breast blister

S20.12

Blister (nonthermal) of breast

Header — needs a more specific code

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

About coding breast blister

The ICD-10-CM code for breast blister is S20.12 (Blister (nonthermal) of breast).

Within S20.1 (other and unspecified superficial injuries of breast), S20.12 is specifically for Blister (nonthermal) of breast. Related codes cover unspecified superficial injuries of breast (S20.10), abrasion of breast (S20.11), external constriction of part of breast (S20.14), superficial foreign body of breast (S20.15), insect bite (nonvenomous) of breast (S20.16) and other superficial bite of breast (S20.17).

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 breast blister ICD-10 codes

What is the ICD-10 code for breast blister?

S20.12 — Blister (nonthermal) of breast (a header code; report a more specific subcode).

Is S20.12 billable?

No. S20.12 is a header code. Report one of its more specific subcodes instead.