L24 – Irritant contact dermatitis

ICD-10-CM 2027 diagnosis code · Dermatitis and eczema

Non-billable header

ICD-10-CM code L24

Code: L24 (claims format: L24)
Description: Irritant contact dermatitis
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 12. Diseases of the skin and subcutaneous tissue (L00-L99)
Block: L20-L30 Dermatitis and eczema

Billable codes under L24

L24 is a header code and cannot be used on claims. Choose the most specific code:

L24.0 – Irritant contact dermatitis due to detergentsBillable
L24.1 – Irritant contact dermatitis due to oils and greasesBillable
L24.2 – Irritant contact dermatitis due to solventsBillable
L24.3 – Irritant contact dermatitis due to cosmeticsBillable
L24.4 – Irritant contact dermatitis due to drugs in contact with skinBillable
L24.5 – Irritant contact dermatitis due to other chemical productsBillable
L24.6 – Irritant contact dermatitis due to food in contact with skinBillable
L24.7 – Irritant contact dermatitis due to plants, except foodBillable
L24.8 – Irritant contact dermatitis due to other agentsHeader (more codes below)
L24.9 – Irritant contact dermatitis, unspecified causeBillable
L24.A – Irritant contact dermatitis due to friction or contact with body fluidsHeader (more codes below)
L24.B – Irritant contact dermatitis related to stoma or fistulaHeader (more codes below)

Notes for L24

Excludes1 (not coded here):

allergy NOS (T78.40)
contact dermatitis NOS (L25.9)
dermatitis NOS (L30.9)

Excludes2 (not included here):

allergic contact dermatitis (L23.-)
dermatitis due to substances taken internally (L27.-)
dermatitis of eyelid (H01.1-)
diaper dermatitis (L22)
eczema of external ear (H60.5-)
perioral dermatitis (L71.0)
radiation-related disorders of the skin and subcutaneous tissue (L55-L59)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block L20-L30

Excludes2 (not included here):

chronic (childhood) granulomatous disease (D71-)
dermatitis gangrenosa (L08.0)
dermatitis herpetiformis (L13.0)
dry skin dermatitis (L85.3)
factitial dermatitis (L98.1)
perioral dermatitis (L71.0)
radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
stasis dermatitis (I87.2)

Notes:

In this block the terms dermatitis and eczema are used synonymously and interchangeably.

Frequently asked questions

What is ICD-10 code L24?

L24 is the ICD-10-CM code for irritant contact dermatitis, in the block L20-L30 (Dermatitis and eczema).

Is L24 a billable code?

No. L24 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.