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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  • L97.321—

    Non-pressure chronic ulcer of left ankle limited to breakdown of skin

  • L97.322—

    Non-pressure chronic ulcer of left ankle with fat layer exposed

  • L97.323—

    Non-pressure chronic ulcer of left ankle with necrosis of muscle

  • L97.324—

    Non-pressure chronic ulcer of left ankle with necrosis of bone

  • L97.325—

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

  • L97.326—

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

  • L97.328—

    Non-pressure chronic ulcer of left ankle with other specified severity

  • L97.329—

    Non-pressure chronic ulcer of left ankle with unspecified severity

  • L97.401—

    Non-pressure chronic ulcer of unspecified heel and midfoot limited to breakdown of skin

  • L97.402—

    Non-pressure chronic ulcer of unspecified heel and midfoot with fat layer exposed

  • L97.403—

    Non-pressure chronic ulcer of unspecified heel and midfoot with necrosis of muscle

  • L97.404—

    Non-pressure chronic ulcer of unspecified heel and midfoot with necrosis of bone

  • L97.405—

    Non-pressure chronic ulcer of unspecified heel and midfoot with muscle involvement without evidence of necrosis

  • L97.406—

    Non-pressure chronic ulcer of unspecified heel and midfoot with bone involvement without evidence of necrosis

  • L97.408—

    Non-pressure chronic ulcer of unspecified heel and midfoot with other specified severity

  • L97.409—

    Non-pressure chronic ulcer of unspecified heel and midfoot with unspecified severity

  • L97.411—

    Non-pressure chronic ulcer of right heel and midfoot limited to breakdown of skin

  • L97.412—

    Non-pressure chronic ulcer of right heel and midfoot with fat layer exposed

  • L97.413—

    Non-pressure chronic ulcer of right heel and midfoot with necrosis of muscle

  • L97.414—

    Non-pressure chronic ulcer of right heel and midfoot with necrosis of bone

  • L97.415—

    Non-pressure chronic ulcer of right heel and midfoot with muscle involvement without evidence of necrosis

  • L97.416—

    Non-pressure chronic ulcer of right heel and midfoot with bone involvement without evidence of necrosis

  • L97.418—

    Non-pressure chronic ulcer of right heel and midfoot with other specified severity

  • L97.419—

    Non-pressure chronic ulcer of right heel and midfoot with unspecified severity

  • L97.421—

    Non-pressure chronic ulcer of left heel and midfoot limited to breakdown of skin

  • L97.422—

    Non-pressure chronic ulcer of left heel and midfoot with fat layer exposed

  • L97.423—

    Non-pressure chronic ulcer of left heel and midfoot with necrosis of muscle

  • L97.424—

    Non-pressure chronic ulcer of left heel and midfoot with necrosis of bone

  • L97.425—

    Non-pressure chronic ulcer of left heel and midfoot with muscle involvement without evidence of necrosis

  • L97.426—

    Non-pressure chronic ulcer of left heel and midfoot with bone involvement without evidence of necrosis

  • L97.428—

    Non-pressure chronic ulcer of left heel and midfoot with other specified severity

  • L97.429—

    Non-pressure chronic ulcer of left heel and midfoot with unspecified severity

  • L97.501—

    Non-pressure chronic ulcer of other part of unspecified foot limited to breakdown of skin

  • L97.502—

    Non-pressure chronic ulcer of other part of unspecified foot with fat layer exposed

  • L97.503—

    Non-pressure chronic ulcer of other part of unspecified foot with necrosis of muscle

  • L97.504—

    Non-pressure chronic ulcer of other part of unspecified foot with necrosis of bone

  • L97.505—

    Non-pressure chronic ulcer of other part of unspecified foot with muscle involvement without evidence of necrosis

  • L97.506—

    Non-pressure chronic ulcer of other part of unspecified foot with bone involvement without evidence of necrosis

  • L97.508—

    Non-pressure chronic ulcer of other part of unspecified foot with other specified severity

  • L97.509—

    Non-pressure chronic ulcer of other part of unspecified foot with unspecified severity

  • L97.511—

    Non-pressure chronic ulcer of other part of right foot limited to breakdown of skin

  • L97.512—

    Non-pressure chronic ulcer of other part of right foot with fat layer exposed

  • L97.513—

    Non-pressure chronic ulcer of other part of right foot with necrosis of muscle

  • L97.514—

    Non-pressure chronic ulcer of other part of right foot with necrosis of bone

  • L97.515—

    Non-pressure chronic ulcer of other part of right foot with muscle involvement without evidence of necrosis

  • L97.516—

    Non-pressure chronic ulcer of other part of right foot with bone involvement without evidence of necrosis

  • L97.518—

    Non-pressure chronic ulcer of other part of right foot with other specified severity

  • L97.519—

    Non-pressure chronic ulcer of other part of right foot with unspecified severity

  • L97.521—

    Non-pressure chronic ulcer of other part of left foot limited to breakdown of skin

  • L97.522—

    Non-pressure chronic ulcer of other part of left foot with fat layer exposed

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