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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  • L98.473—

    Non-pressure chronic ulcer of groin with necrosis of muscle

  • L98.474—

    Non-pressure chronic ulcer of groin with necrosis of bone

  • L98.475—

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

  • L98.476—

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

  • L98.478—

    Non-pressure chronic ulcer of groin with other specified severity

  • L98.479—

    Non-pressure chronic ulcer of groin with unspecified severity

  • L98.49—

    Non-pressure chronic ulcer of skin of other sites

  • L98.491—

    Non-pressure chronic ulcer of skin of other sites limited to breakdown of skin

  • L98.492—

    Non-pressure chronic ulcer of skin of other sites with fat layer exposed

  • L98.493—

    Non-pressure chronic ulcer of skin of other sites with necrosis of muscle

  • L98.494—

    Non-pressure chronic ulcer of skin of other sites with necrosis of bone

  • L98.495—

    Non-pressure chronic ulcer of skin of other sites with muscle involvement without evidence of necrosis

  • L98.496—

    Non-pressure chronic ulcer of skin of other sites with bone involvement without evidence of necrosis

  • L98.498—

    Non-pressure chronic ulcer of skin of other sites with other specified severity

  • L98.499—

    Non-pressure chronic ulcer of skin of other sites with unspecified severity

  • L98.5—

    Mucinosis of the skin

  • L98.6—

    Other infiltrative disorders of the skin and subcutaneous tissue

  • L98.7—

    Excessive and redundant skin and subcutaneous tissue

  • L98.8—

    Other specified disorders of the skin and subcutaneous tissue

  • L98.9—

    Disorder of the skin and subcutaneous tissue, unspecified

  • L98.A—

    Non-pressure chronic ulcer of upper limb, not elsewhere classified

  • L98.A1—

    Non-pressure chronic ulcer of upper arm

  • L98.A11—

    Non-pressure chronic ulcer of right upper arm

  • L98.A111—

    Non-pressure chronic ulcer of right upper arm limited to breakdown of skin

  • L98.A112—

    Non-pressure chronic ulcer of right upper arm with fat layer exposed

  • L98.A113—

    Non-pressure chronic ulcer of right upper arm with necrosis of muscle

  • L98.A114—

    Non-pressure chronic ulcer of right upper arm with necrosis of bone

  • L98.A115—

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

  • L98.A116—

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

  • L98.A118—

    Non-pressure chronic ulcer of right upper arm with other specified severity

  • L98.A119—

    Non-pressure chronic ulcer of right upper arm with unspecified severity

  • L98.A12—

    Non-pressure chronic ulcer of left upper arm

  • L98.A121—

    Non-pressure chronic ulcer of left upper arm limited to breakdown of skin

  • L98.A122—

    Non-pressure chronic ulcer of left upper arm with fat layer exposed

  • L98.A123—

    Non-pressure chronic ulcer of left upper arm with necrosis of muscle

  • L98.A124—

    Non-pressure chronic ulcer of left upper arm with necrosis of bone

  • L98.A125—

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

  • L98.A126—

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

  • L98.A128—

    Non-pressure chronic ulcer of left upper arm with other specified severity

  • L98.A129—

    Non-pressure chronic ulcer of left upper arm with unspecified severity

  • L98.A19—

    Non-pressure chronic ulcer of unspecified upper arm

  • L98.A191—

    Non-pressure chronic ulcer of unspecified upper arm limited to breakdown of skin

  • L98.A192—

    Non-pressure chronic ulcer of unspecified upper arm with fat layer exposed

  • L98.A193—

    Non-pressure chronic ulcer of unspecified upper arm with necrosis of muscle

  • L98.A194—

    Non-pressure chronic ulcer of unspecified upper arm with necrosis of bone

  • L98.A195—

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

  • L98.A196—

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

  • L98.A198—

    Non-pressure chronic ulcer of unspecified upper arm with other specified severity

  • L98.A199—

    Non-pressure chronic ulcer of unspecified upper arm with unspecified severity

  • L98.A2—

    Non-pressure chronic ulcer of forearm

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