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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  • L97.118—

    Non-pressure chronic ulcer of right thigh with other specified severity

  • L97.119—

    Non-pressure chronic ulcer of right thigh with unspecified severity

  • L97.121—

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

  • L97.122—

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

  • L97.123—

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

  • L97.124—

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

  • L97.125—

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

  • L97.126—

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

  • L97.128—

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

  • L97.129—

    Non-pressure chronic ulcer of left thigh with unspecified severity

  • L97.201—

    Non-pressure chronic ulcer of unspecified calf limited to breakdown of skin

  • L97.202—

    Non-pressure chronic ulcer of unspecified calf with fat layer exposed

  • L97.203—

    Non-pressure chronic ulcer of unspecified calf with necrosis of muscle

  • L97.204—

    Non-pressure chronic ulcer of unspecified calf with necrosis of bone

  • L97.205—

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

  • L97.206—

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

  • L97.208—

    Non-pressure chronic ulcer of unspecified calf with other specified severity

  • L97.209—

    Non-pressure chronic ulcer of unspecified calf with unspecified severity

  • L97.211—

    Non-pressure chronic ulcer of right calf limited to breakdown of skin

  • L97.212—

    Non-pressure chronic ulcer of right calf with fat layer exposed

  • L97.213—

    Non-pressure chronic ulcer of right calf with necrosis of muscle

  • L97.214—

    Non-pressure chronic ulcer of right calf with necrosis of bone

  • L97.215—

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

  • L97.216—

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

  • L97.218—

    Non-pressure chronic ulcer of right calf with other specified severity

  • L97.219—

    Non-pressure chronic ulcer of right calf with unspecified severity

  • L97.221—

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

  • L97.222—

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

  • L97.223—

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

  • L97.224—

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

  • L97.225—

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

  • L97.226—

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

  • L97.228—

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

  • L97.229—

    Non-pressure chronic ulcer of left calf with unspecified severity

  • L97.301—

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

  • L97.302—

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

  • L97.303—

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

  • L97.304—

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

  • L97.305—

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

  • L97.306—

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

  • L97.308—

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

  • L97.309—

    Non-pressure chronic ulcer of unspecified ankle with unspecified severity

  • L97.311—

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

  • L97.312—

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

  • L97.313—

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

  • L97.314—

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

  • L97.315—

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

  • L97.316—

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

  • L97.318—

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

  • L97.319—

    Non-pressure chronic ulcer of right ankle with unspecified severity

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