L23

L23: Allergic contact dermatitis

Non-billable headerICD-10-CM

L23 is a non-billable header ICD-10-CM code for allergic contact dermatitis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

dermatitis due to substances taken internally (L27.-)
dermatitis of eyelid (H01.1-)
diaper dermatitis (L22)
eczema of external ear (H60.5-)
irritant contact dermatitis (L24.-)
perioral dermatitis (L71.0)
radiation-related disorders of the skin and subcutaneous tissue (L55-L59)

Other codes that can never be billed with L23

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

L25Unspecified contact dermatitis
L50Urticaria
L53Other erythematous conditions
T61Toxic effect of noxious substances eaten as seafood
T62Toxic effect of other noxious substances eaten as food
T78.4Other and unspecified allergy

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead L23

10 child codes. Green means billable.