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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  • L63.0—

    Alopecia (capitis) totalis

  • L63.1—

    Alopecia universalis

  • L63.2—

    Ophiasis

  • L63.8—

    Other alopecia areata

  • L63.9—

    Alopecia areata, unspecified

  • L64—

    Androgenic alopecia

  • L64.0—

    Drug-induced androgenic alopecia

  • L64.8—

    Other androgenic alopecia

  • L64.9—

    Androgenic alopecia, unspecified

  • L65—

    Other nonscarring hair loss

  • L65.0—

    Telogen effluvium

  • L65.1—

    Anagen effluvium

  • L65.2—

    Alopecia mucinosa

  • L65.8—

    Other specified nonscarring hair loss

  • L65.9—

    Nonscarring hair loss, unspecified

  • L66—

    Cicatricial alopecia [scarring hair loss]

  • L66.0—

    Pseudopelade

  • L66.1—

    Lichen planopilaris

  • L66.10—

    Lichen planopilaris, unspecified

  • L66.11—

    Classic lichen planopilaris

  • L66.12—

    Frontal fibrosing alopecia

  • L66.19—

    Other lichen planopilaris

  • L66.2—

    Folliculitis decalvans

  • L66.3—

    Perifolliculitis capitis abscedens

  • L66.4—

    Folliculitis ulerythematosa reticulata

  • L66.8—

    Other cicatricial alopecia

  • L66.81—

    Central centrifugal cicatricial alopecia

  • L66.89—

    Other cicatricial alopecia

  • L66.9—

    Cicatricial alopecia, unspecified

  • L67—

    Hair color and hair shaft abnormalities

  • L67.0—

    Trichorrhexis nodosa

  • L67.1—

    Variations in hair color

  • L67.8—

    Other hair color and hair shaft abnormalities

  • L67.9—

    Hair color and hair shaft abnormality, unspecified

  • L68—

    Hypertrichosis

  • L68.0—

    Hirsutism

  • L68.1—

    Acquired hypertrichosis lanuginosa

  • L68.2—

    Localized hypertrichosis

  • L68.3—

    Polytrichia

  • L68.8—

    Other hypertrichosis

  • L68.9—

    Hypertrichosis, unspecified

  • L70—

    Acne

  • L70.0—

    Acne vulgaris

  • L70.1—

    Acne conglobata

  • L70.2—

    Acne varioliformis

  • L70.3—

    Acne tropica

  • L70.4—

    Infantile acne

  • L70.5—

    Acné excoriée

  • L70.8—

    Other acne

  • L70.9—

    Acne, unspecified

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