All ICD10 Codes
Chapter 12

L00–L99: Diseases of the Skin and Subcutaneous Tissue

Diseases of the Skin and Subcutaneous Tissue diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)
All CodesBillable Only
Internal Codes
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  • L49.7—

    Exfoliation due to erythematous condition involving 70-79 percent of body surface

  • L49.8—

    Exfoliation due to erythematous condition involving 80-89 percent of body surface

  • L49.9—

    Exfoliation due to erythematous condition involving 90 or more percent of body surface

  • L50.0—

    Allergic urticaria

  • L50.1—

    Idiopathic urticaria

  • L50.2—

    Urticaria due to cold and heat

  • L50.3—

    Dermatographic urticaria

  • L50.4—

    Vibratory urticaria

  • L50.5—

    Cholinergic urticaria

  • L50.6—

    Contact urticaria

  • L50.8—

    Other urticaria

  • L50.9—

    Urticaria, unspecified

  • L51.0—

    Nonbullous erythema multiforme

  • L51.1—

    Stevens-Johnson syndrome

  • L51.2—

    Toxic epidermal necrolysis [Lyell]

  • L51.3—

    Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndrome

  • L51.8—

    Other erythema multiforme

  • L51.9—

    Erythema multiforme, unspecified

  • L52—

    Erythema nodosum

  • L53.0—

    Toxic erythema

  • L53.1—

    Erythema annulare centrifugum

  • L53.2—

    Erythema marginatum

  • L53.3—

    Other chronic figurate erythema

  • L53.8—

    Other specified erythematous conditions

  • L53.9—

    Erythematous condition, unspecified

  • L54—

    Erythema in diseases classified elsewhere

  • L55.0—

    Sunburn of first degree

  • L55.1—

    Sunburn of second degree

  • L55.2—

    Sunburn of third degree

  • L55.9—

    Sunburn, unspecified

  • L56.0—

    Drug phototoxic response

  • L56.1—

    Drug photoallergic response

  • L56.2—

    Photocontact dermatitis [berloque dermatitis]

  • L56.3—

    Solar urticaria

  • L56.4—

    Polymorphous light eruption

  • L56.5—

    Disseminated superficial actinic porokeratosis (DSAP)

  • L56.8—

    Other specified acute skin changes due to ultraviolet radiation

  • L56.9—

    Acute skin change due to ultraviolet radiation, unspecified

  • L57.0—

    Actinic keratosis

  • L57.1—

    Actinic reticuloid

  • L57.2—

    Cutis rhomboidalis nuchae

  • L57.3—

    Poikiloderma of Civatte

  • L57.4—

    Cutis laxa senilis

  • L57.5—

    Actinic granuloma

  • L57.8—

    Other skin changes due to chronic exposure to nonionizing radiation

  • L57.9—

    Skin changes due to chronic exposure to nonionizing radiation, unspecified

  • L58.0—

    Acute radiodermatitis

  • L58.1—

    Chronic radiodermatitis

  • L58.9—

    Radiodermatitis, unspecified

  • L59.0—

    Erythema ab igne [dermatitis ab igne]

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