Chapter XII
Diseases of the skin and subcutaneous tissue
(L00-L99)

Dermatitis and eczema
(L20-L30)

Note: In this block the terms dermatitis and eczema are used synonymously and interchangeably.
Excludes: chronic (childhood) granulomatous disease ( D71 )
dermatitis:
· dry skin ( L85.3 )
· factitial ( L98.1 )
· gangrenosa ( L88 )
· herpetiformis ( L13.0 )
· perioral ( L71.0 )
· stasis ( I83.1-I83.2 )
radiation-related disorders of the skin and subcutaneous tissue ( L55-L59 )

L20 Atopic dermatitis
Excludes: circumscribed neurodermatitis ( L28.0 )
L20.0 Besnier's prurigo
L20.8 Other atopic dermatitis
Eczema:
· flexural NEC
· infantile (acute)(chronic)
· intrinsic (allergic)
Neurodermatitis:
· atopic
· diffuse
L20.9 Atopic dermatitis, unspecified

L21 Seborrhoeic dermatitis
Excludes: infective dermatitis ( L30.3 )
L21.0 Seborrhoea capitis
Cradle cap
L21.1 Seborrhoeic infantile dermatitis
L21.8 Other seborrhoeic dermatitis
L21.9 Seborrhoeic dermatitis, unspecified

L22 Diaper [napkin] dermatitis
Diaper or napkin:
· erythema
· rash
Psoriasiform napkin rash

L23 Allergic contact dermatitis
Includes: allergic contact eczema
Excludes: allergy NOS ( T78.4 )
dermatitis (of):
· NOS ( L30.9 )
· contact NOS ( L25.9 )
· diaper [napkin] ( L22 )
· due to substances taken internally ( L27.- )
· eyelid ( H01.1 )
· irritant contact ( L24.- )
· perioral ( L71.0 )
eczema of external ear ( H60.5 )
radiation-related disorders of the skin and subcutaneous tissue ( L55-L59 )
L23.0 Allergic contact dermatitis due to metals
Chromium
Nickel
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
Use additional external cause code (Chapter XX), if desired, to identify drug.
Excludes: allergic reaction NOS due to drugs ( T88.7 )
dermatitis due to ingested drugs and medicaments ( L27.0-L27.1 )
L23.4 Allergic contact dermatitis due to dyes
L23.5 Allergic contact dermatitis due to other chemical products
Cement
Insecticide
Plastic
Rubber
L23.6 Allergic contact dermatitis due to food in contact with skin
Excludes: dermatitis due to ingested food ( L27.2 )
L23.7 Allergic contact dermatitis due to plants, except food
L23.8 Allergic contact dermatitis due to other agents
L23.9 Allergic contact dermatitis, unspecified cause
Allergic contact eczema NOS

L24 Irritant contact dermatitis
Includes: irritant contact eczema
Excludes: allergy NOS ( T78.4 )
dermatitis (of):
· NOS ( L30.9 )
· allergic contact ( L23.- )
· contact NOS ( L25.9 )
· diaper [napkin] ( L22 )
· due to substances taken internally ( L27.- )
· eyelid ( H01.1 )
· perioral ( L71.0 )
eczema of external ear ( H60.5 )
radiation-related disorders of the skin and subcutaneous tissue ( L55-L59 )
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
Solvents:
· chlorocompound
· cyclohexane
· ester
· glycol
· hydrocarbon
· ketone
L24.3 Irritant contact dermatitis due to cosmetics
L24.4 Irritant contact dermatitis due to drugs in contact with skin
Use additional external cause code (Chapter XX), if desired, to identify drug.
Excludes: allergic reaction NOS due to drugs ( T88.7 )
dermatitis due to ingested drugs and medicaments ( L27.0-L27.1 )
L24.5 Irritant contact dermatitis due to other chemical products
Cement
Insecticide
L24.6 Irritant contact dermatitis due to food in contact with skin
Excludes: dermatitis due to ingested food ( L27.2 )
L24.7 Irritant contact dermatitis due to plants, except food
L24.8 Irritant contact dermatitis due to other agents
Dyes
L24.9 Irritant contact dermatitis, unspecified cause
Irritant contact eczema NOS

L25 Unspecified contact dermatitis
Includes: unspecified contact eczema
Excludes: allergy NOS ( T78.4 )
dermatitis (of):
· NOS ( L30.9 )
· allergic contact ( L23.- )
· due to substances taken internally ( L27.- )
· eyelid ( H01.1 )
· irritant contact ( L24.- )
· perioral ( L71.0 )
eczema of external ear ( H60.5 )
radiation-related disorders of the skin and subcutaneous tissue ( L55-L59 )
L25.0 Unspecified contact dermatitis due to cosmetics
L25.1 Unspecified contact dermatitis due to drugs in contact with skin
Use additional external cause code (Chapter XX), if desired, to identify drug.
Excludes: allergic reaction NOS due to drugs ( T88.7 )
dermatitis due to ingested drugs and medicaments ( L27.0-L27.1 )
L25.2 Unspecified contact dermatitis due to dyes
L25.3 Unspecified contact dermatitis due to other chemical products
Cement
Insecticide
L25.4 Unspecified contact dermatitis due to food in contact with skin
Excludes: dermatitis due to ingested food ( L27.2 )
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
Contact:
· dermatitis (occupational) NOS
· eczema (occupational) NOS

L26 Exfoliative dermatitis
Hebra's pityriasis
Excludes: Ritter's disease ( L00 )

L27 Dermatitis due to substances taken internally
Excludes: adverse:
· effect NOS of drugs ( T88.7 )
· food reaction, except dermatitis ( T78.0-T78.1 )
allergy NOS ( T78.4 )
contact dermatitis ( L23-L25 )
drug:
· photoallergic response ( L56.1 )
· phototoxic response ( L56.0 )
urticaria ( L50.- )
L27.0 Generalized skin eruption due to drugs and medicaments
Use additional external cause code (Chapter XX), if desired, to identify drug.
L27.1 Localized skin eruption due to drugs and medicaments
Use additional external cause code (Chapter XX), if desired, to identify drug.
L27.2 Dermatitis due to ingested food
Excludes: dermatitis due to food in contact with skin ( L23.6 , L24.6 , L25.4 )
L27.8 Dermatitis due to other substances taken internally
L27.9 Dermatitis due to unspecified substance taken internally

L28 Lichen simplex chronicus and prurigo
L28.0 Lichen simplex chronicus
Circumscribed neurodermatitis
Lichen NOS
L28.1 Prurigo nodularis
L28.2 Other prurigo
Prurigo:
· NOS
· Hebra
· mitis
Urticaria papulosa

L29 Pruritus
Excludes: neurotic excoriation ( L98.1 )
psychogenic pruritus ( F45.8 )
L29.0 Pruritus ani
L29.1 Pruritus scroti
L29.2 Pruritus vulvae
L29.3 Anogenital pruritus, unspecified
L29.8 Other pruritus
L29.9 Pruritus, unspecified
Itch NOS

L30 Other dermatitis
Excludes: dermatitis:
· contact ( L23-L25 )
· dry skin ( L85.3 )
small plaque parapsoriasis ( L41.3 )
stasis dermatitis ( I83.1-I83.2 )
L30.0 Nummular dermatitis
L30.1 Dyshidrosis [pompholyx]
L30.2 Cutaneous autosensitization
Candidid [levurid]
Dermatophytid
Eczematid
L30.3 Infective dermatitis
Infectious eczematoid dermatitis
L30.4 Erythema intertrigo
L30.5 Pityriasis alba
L30.8 Other specified dermatitis
L30.9 Dermatitis, unspecified
Eczema NOS