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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  • L97.925—

    Non-pressure chronic ulcer of unspecified part of left lower leg with muscle involvement without evidence of necrosis

  • L97.926—

    Non-pressure chronic ulcer of unspecified part of left lower leg with bone involvement without evidence of necrosis

  • L97.928—

    Non-pressure chronic ulcer of unspecified part of left lower leg with other specified severity

  • L97.929—

    Non-pressure chronic ulcer of unspecified part of left lower leg with unspecified severity

  • L98.0—

    Pyogenic granuloma

  • L98.1—

    Factitial dermatitis

  • L98.2—

    Febrile neutrophilic dermatosis [Sweet]

  • L98.3—

    Eosinophilic cellulitis [Wells]

  • L98.411—

    Non-pressure chronic ulcer of buttock limited to breakdown of skin

  • L98.412—

    Non-pressure chronic ulcer of buttock with fat layer exposed

  • L98.413—

    Non-pressure chronic ulcer of buttock with necrosis of muscle

  • L98.414—

    Non-pressure chronic ulcer of buttock with necrosis of bone

  • L98.415—

    Non-pressure chronic ulcer of buttock with muscle involvement without evidence of necrosis

  • L98.416—

    Non-pressure chronic ulcer of buttock with bone involvement without evidence of necrosis

  • L98.418—

    Non-pressure chronic ulcer of buttock with other specified severity

  • L98.419—

    Non-pressure chronic ulcer of buttock with unspecified severity

  • L98.421—

    Non-pressure chronic ulcer of back limited to breakdown of skin

  • L98.422—

    Non-pressure chronic ulcer of back with fat layer exposed

  • L98.423—

    Non-pressure chronic ulcer of back with necrosis of muscle

  • L98.424—

    Non-pressure chronic ulcer of back with necrosis of bone

  • L98.425—

    Non-pressure chronic ulcer of back with muscle involvement without evidence of necrosis

  • L98.426—

    Non-pressure chronic ulcer of back with bone involvement without evidence of necrosis

  • L98.428—

    Non-pressure chronic ulcer of back with other specified severity

  • L98.429—

    Non-pressure chronic ulcer of back with unspecified severity

  • L98.431—

    Non-pressure chronic ulcer of abdomen limited to breakdown of skin

  • L98.432—

    Non-pressure chronic ulcer of abdomen with fat layer exposed

  • L98.433—

    Non-pressure chronic ulcer of abdomen with necrosis of muscle

  • L98.434—

    Non-pressure chronic ulcer of abdomen with necrosis of bone

  • L98.435—

    Non-pressure chronic ulcer of abdomen with muscle involvement without evidence of necrosis

  • L98.436—

    Non-pressure chronic ulcer of abdomen with bone involvement without evidence of necrosis

  • L98.438—

    Non-pressure chronic ulcer of abdomen with other specified severity

  • L98.439—

    Non-pressure chronic ulcer of abdomen with unspecified severity

  • L98.441—

    Non-pressure chronic ulcer of chest limited to breakdown of skin

  • L98.442—

    Non-pressure chronic ulcer of chest with fat layer exposed

  • L98.443—

    Non-pressure chronic ulcer of chest with necrosis of muscle

  • L98.444—

    Non-pressure chronic ulcer of chest with necrosis of bone

  • L98.445—

    Non-pressure chronic ulcer of chest with muscle involvement without evidence of necrosis

  • L98.446—

    Non-pressure chronic ulcer of chest with bone involvement without evidence of necrosis

  • L98.448—

    Non-pressure chronic ulcer of chest with other specified severity

  • L98.449—

    Non-pressure chronic ulcer of chest with unspecified severity

  • L98.451—

    Non-pressure chronic ulcer of neck limited to breakdown of skin

  • L98.452—

    Non-pressure chronic ulcer of neck with fat layer exposed

  • L98.453—

    Non-pressure chronic ulcer of neck with necrosis of muscle

  • L98.454—

    Non-pressure chronic ulcer of neck with necrosis of bone

  • L98.455—

    Non-pressure chronic ulcer of neck with muscle involvement without evidence of necrosis

  • L98.456—

    Non-pressure chronic ulcer of neck with bone involvement without evidence of necrosis

  • L98.458—

    Non-pressure chronic ulcer of neck with other specified severity

  • L98.459—

    Non-pressure chronic ulcer of neck with unspecified severity

  • L98.461—

    Non-pressure chronic ulcer of face limited to breakdown of skin

  • L98.462—

    Non-pressure chronic ulcer of face with fat layer exposed

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