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  4. Dermatitis and eczema (L20-L30)

Dermatitis and eczema (L20-L30)

ICD-10 codes L20-L30 cover various types of dermatitis and eczema, including atopic, seborrheic, contact, irritant, and other forms of inflammatory skin conditions characterized by itching, redness, and rash.

This range includes atopic dermatitis (L20), commonly known as eczema, with synonyms like Besnier's prurigo and flexural eczema for specific variants. It also covers seborrheic dermatitis (L21), often called cradle cap or dandruff, and the diaper dermatitis (L22) associated with rash in infants. Allergic contact dermatitis (L23) details reactions to metals, adhesives, cosmetics, and other allergens, while irritant contact dermatitis (L24) involves skin irritation from detergents, oils, solvents, and body fluids. Unspecified and other dermatitis types are coded under L25-L30. These codes assist healthcare professionals in accurately documenting skin disorders caused by internal substances, allergies, or irritants, using synonyms like prurigo nodularis, lichen simplex chronicus, and nummular dermatitis to ensure precise classification.

  • Diseases of the skin and subcutaneous tissue (L00–L99)

    • Dermatitis and eczema (L20-L30)

        • Allergic contact dermatitis (L23)

        • L23 Allergic contact dermatitis
        • L23.0 Allergic contact dermatitis due to metals
        • L23.1 Allergic contact dermatitis due to adhesives
        • L23.2 Allergic contact dermatitis due to cosmetics
        • L23.3 Allergic contact dermatitis due to drugs in contact with skin
        • L23.4 Allergic contact dermatitis due to dyes
        • L23.5 Allergic contact dermatitis due to other chemical products
        • L23.6 Allergic contact dermatitis due to food in contact with the skin
        • L23.7 Allergic contact dermatitis due to plants, except food
        • L23.8 Allergic contact dermatitis due to other agents
        • L23.81 Allergic contact dermatitis due to animal (cat) (dog) dander
        • L23.89 Allergic contact dermatitis due to other agents
        • L23.9 Allergic contact dermatitis, unspecified cause

        • Irritant contact dermatitis (L24)

        • L24 Irritant contact dermatitis
        • L24.0 Irritant contact dermatitis due to detergents
        • L24.1 Irritant contact dermatitis due to oils and greases
        • L24.2 Irritant contact dermatitis due to solvents
        • L24.3 Irritant contact dermatitis due to cosmetics
        • L24.4 Irritant contact dermatitis due to drugs in contact with skin
        • L24.5 Irritant contact dermatitis due to other chemical products
        • L24.6 Irritant contact dermatitis due to food in contact with skin
        • L24.7 Irritant contact dermatitis due to plants, except food
        • L24.8 Irritant contact dermatitis due to other agents
        • L24.81 Irritant contact dermatitis due to metals
        • L24.89 Irritant contact dermatitis due to other agents
        • L24.9 Irritant contact dermatitis, unspecified cause
        • L24.A Irritant contact dermatitis due to friction or contact with body fluids
        • L24.A0 Irritant contact dermatitis due to friction or contact with body fluids, unspecified
        • L24.A1 Irritant contact dermatitis due to saliva
        • L24.A2 Irritant contact dermatitis due to fecal, urinary or dual incontinence
        • L24.A9 Irritant contact dermatitis due friction or contact with other specified body fluids
        • L24.B Irritant contact dermatitis related to stoma or fistula
        • L24.B0 Irritant contact dermatitis related to unspecified stoma or fistula
        • L24.B1 Irritant contact dermatitis related to digestive stoma or fistula
        • L24.B2 Irritant contact dermatitis related to respiratory stoma or fistula
        • L24.B3 Irritant contact dermatitis related to fecal or urinary stoma or fistula

        • Unspecified contact dermatitis (L25)

        • L25 Unspecified contact dermatitis
        • L25.0 Unspecified contact dermatitis due to cosmetics
        • L25.1 Unspecified contact dermatitis due to drugs in contact with skin
        • L25.2 Unspecified contact dermatitis due to dyes
        • L25.3 Unspecified contact dermatitis due to other chemical products
        • L25.4 Unspecified contact dermatitis due to food in contact with skin
        • L25.5 Unspecified contact dermatitis due to plants, except food
        • L25.8 Unspecified contact dermatitis due to other agents
        • L25.9 Unspecified contact dermatitis, unspecified cause

        • Dermatitis due to substances taken internally (L27)

        • L27 Dermatitis due to substances taken internally
        • L27.0 Generalized skin eruption due to drugs and medicaments taken internally
        • L27.1 Localized skin eruption due to drugs and medicaments taken internally
        • L27.2 Dermatitis due to ingested food
        • L27.8 Dermatitis due to other substances taken internally
        • L27.9 Dermatitis due to unspecified substance taken internally

Instructional Notations

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • 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

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