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ICD-10-CM 2027

ICD-10 code for flank blister

S30.82A

Blister (nonthermal) of flank

Header — needs a more specific code

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

About coding flank blister

The ICD-10-CM code for flank blister is S30.82A (Blister (nonthermal) of flank).

Within S30.82 (Blister (nonthermal) of abdomen, lower back, pelvis and external genitals), S30.82A is specifically for Blister (nonthermal) of flank. Related codes cover lower back and pelvis (S30.820), abdominal wall (S30.821), penis (S30.822), scrotum and testes (S30.823), vagina and vulva (S30.824), unspecified external genital organs, male (S30.825), unspecified external genital organs, female (S30.826) and anus (S30.827).

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 was added in FY2026, effective October 1, 2025.

Common questions about flank blister ICD-10 codes

What is the ICD-10 code for flank blister?

S30.82A — Blister (nonthermal) of flank (a header code; report a more specific subcode).

Is S30.82A billable?

No. S30.82A is a header code. Report one of its more specific subcodes instead.