L24.9

L24.9: Irritant contact dermatitis, unspecified cause

Billable / specific codeICD-10-CM

L24.9 is a billable, specific ICD-10-CM code for irritant contact dermatitis, unspecified cause. It is valid for submission on a claim.

Check L24.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Irritant contact eczema NOS

Excludes1 inherited from the categories above L24.9

A category’s note binds every code beneath it.

Written on L24: Irritant contact dermatitis

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

Excludes2 inherited from the categories above L24.9

Not part of this code, but both may be coded when both are present.

Written on L24: Irritant contact dermatitis

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)

Other codes that can never be billed with L24.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

L25Unspecified contact dermatitis

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

L24.9 is named in 12 Medicare coverage policies: 12 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A56558Billing and Coding: Allergy Testing
A57531Billing and Coding: Allergy Testing
A60360Billing and Coding: Allergy Diagnostic Testing
A60361Billing and Coding: Allergy Diagnostic Testing

Alphabetic index entries that lead here

Dermatitis›contact›irritant
Dermatitis›due to›external irritant NEC

Code history

Unchanged in every release from FY2024 to FY2027.