L25Unspecified contact dermatitis

L25 is the ICD-10-CM diagnosis code for unspecified contact dermatitis. It belongs to block L20-L30 (dermatitis and eczema) and chapter 12 (diseases of the skin and subcutaneous tissue). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: L25.0 (due to cosmetics), L25.1 (due to drugs in contact with skin), L25.2 (due to dyes), L25.3 (due to other chemical products), L25.4 (due to food in contact with skin), L25.5 (due to plants, except food), L25.8 (due to other agents) and L25.9 (unspecified cause).

Don't report L25 together with the conditions in its Excludes1 note: allergic contact dermatitis (L23.-), allergy NOS (T78.40), dermatitis NOS (L30.9) and irritant contact dermatitis (L24.-).

The conditions in its Excludes2 note aren't part of L25, but may be coded alongside it if the patient has both: dermatitis due to ingested substances (L27.-), dermatitis of eyelid (H01.1-), eczema of external ear (H60.5-), perioral dermatitis (L71.0) and 1 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.