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ICD-10-CM chapter 12 · L00-L99

Diseases of the skin and subcutaneous tissue

About chapter 12

Chapter 12 (L00-L99) contains 74 categories and 1,001 billable codes for FY2027. This year's update added 1 and deleted 0 codes here. 50 codes are MCCs and 339 are CCs when reported as secondary diagnoses.

9 code blocks

Chapter notes

Excludes2
  • 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.-)