L24.B1 vs L30.9

L24.B1 (Irritant contact dermatitis related to digestive stoma or fistula) compared with L30.9 (Dermatitis, unspecified), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Relationship

Conflict

Excludes1 conflict

L24.B1

Irritant contact dermatitis related to digestive stoma or fistula

↔

L30.9

Dermatitis, unspecified

Not coded here — these two are mutually exclusive.

“dermatitis NOS (L30.9)”

An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.

Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a

Can these codes be reported together?

No — do not report together. L24.B1 carries an Excludes1 note covering L30.9: “dermatitis NOS (L30.9)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

	L24.B1Irritant contact dermatitis related to digestive stoma or fistula	L30.9Dermatitis, unspecified
Billing status	Billable	Billable
Classification	L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)	L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
Definition	Irritant contact dermatitis related to digestive stoma or fistula is a billable ICD-10-CM diagnosis code (L24.B1).	Dermatitis, unspecified is a billable ICD-10-CM diagnosis code (L30.9).
Includes	Irritant contact dermatitis related to gastrostomy Irritant contact dermatitis related to jejunostomy Irritant contact dermatitis related to saliva or spit fistula	Eczema NOS
Use additional code	code to identify any artificial opening status (Z93.-), if applicable, for contact dermatitis related to stoma secretions	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources