2020 ICD-10-CM Diagnosis Code L91

Hypertrophic disorders of skin

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • L91 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM L91 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L91 - other international versions of ICD-10 L91 may differ.
The following code(s) above L91 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to L91:
  • L00-L99
    2020 ICD-10-CM Range L00-L99

    Diseases of the skin and subcutaneous tissue

    Type 2 Excludes
    • 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.-)
    Diseases of the skin and subcutaneous tissue
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to L91:
  • Type 2 Excludes: L85
    ICD-10-CM Diagnosis Code L85

    Other epidermal thickening

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • hypertrophic disorders of the skin (L91.-)
ICD-10-CM Codes Adjacent To L91
L90 Atrophic disorders of skin
L90.0 Lichen sclerosus et atrophicus
L90.1 Anetoderma of Schweninger-Buzzi
L90.2 Anetoderma of Jadassohn-Pellizzari
L90.3 Atrophoderma of Pasini and Pierini
L90.4 Acrodermatitis chronica atrophicans
L90.5 Scar conditions and fibrosis of skin
L90.6 Striae atrophicae
L90.8 Other atrophic disorders of skin
L90.9 Atrophic disorder of skin, unspecified
L91 Hypertrophic disorders of skin
L91.0 Hypertrophic scar
L91.8 Other hypertrophic disorders of the skin
L91.9 Hypertrophic disorder of the skin, unspecified
L92 Granulomatous disorders of skin and subcutaneous tissue
L92.0 Granuloma annulare
L92.1 Necrobiosis lipoidica, not elsewhere classified
L92.2 Granuloma faciale [eosinophilic granuloma of skin]
L92.3 Foreign body granuloma of the skin and subcutaneous tissue
L92.8 Other granulomatous disorders of the skin and subcutaneous tissue
L92.9 Granulomatous disorder of the skin and subcutaneous tissue, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.