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.A199—

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

  • L98.A211—

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

  • L98.A212—

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

  • L98.A213—

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

  • L98.A214—

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

  • L98.A215—

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

  • L98.A216—

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

  • L98.A218—

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

  • L98.A219—

    Non-pressure chronic ulcer of right forearm with unspecified severity

  • L98.A221—

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

  • L98.A222—

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

  • L98.A223—

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

  • L98.A224—

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

  • L98.A225—

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

  • L98.A226—

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

  • L98.A228—

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

  • L98.A229—

    Non-pressure chronic ulcer of left forearm with unspecified severity

  • L98.A291—

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

  • L98.A292—

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

  • L98.A293—

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

  • L98.A294—

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

  • L98.A295—

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

  • L98.A296—

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

  • L98.A298—

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

  • L98.A299—

    Non-pressure chronic ulcer of unspecified forearm with unspecified severity

  • L98.A311—

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

  • L98.A312—

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

  • L98.A313—

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

  • L98.A314—

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

  • L98.A315—

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

  • L98.A316—

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

  • L98.A318—

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

  • L98.A319—

    Non-pressure chronic ulcer of right hand with unspecified severity

  • L98.A321—

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

  • L98.A322—

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

  • L98.A323—

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

  • L98.A324—

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

  • L98.A325—

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

  • L98.A326—

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

  • L98.A328—

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

  • L98.A329—

    Non-pressure chronic ulcer of left hand with unspecified severity

  • L98.A391—

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

  • L98.A392—

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

  • L98.A393—

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

  • L98.A394—

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

  • L98.A395—

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

  • L98.A396—

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

  • L98.A398—

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

  • L98.A399—

    Non-pressure chronic ulcer of unspecified hand with unspecified severity

  • L99—

    Other disorders of skin and subcutaneous tissue in diseases classified elsewhere

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