2020 ICD-10-CM Diagnosis Code L91.0

Hypertrophic scar

    2016 2017 2018 2019 2020 Billable/Specific Code
  • L91.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM L91.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L91.0 - other international versions of ICD-10 L91.0 may differ.
Applicable To
  • Keloid
  • Keloid scar
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (L91.0) and the excluded code together.
  • acne keloid (
    ICD-10-CM Diagnosis Code L73.0

    Acne keloid

      2016 2017 2018 2019 2020 Billable/Specific Code
    L73.0
    )
  • scar NOS (
    ICD-10-CM Diagnosis Code L90.5

    Scar conditions and fibrosis of skin

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Adherent scar (skin)
    • Cicatrix
    • Disfigurement of skin due to scar
    • Fibrosis of skin NOS
    • Scar NOS
    Type 2 Excludes
    L90.5
    )
The following code(s) above L91.0 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 L91.0:
  • 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
Approximate Synonyms
  • Keloid
  • Keloid scar
Clinical Information
  • (key-loyd) a thick, irregular scar caused by excessive tissue growth at the site of an incision or wound.
  • A sharply elevated, irregularly shaped, progressively enlarging scar resulting from formation of excessive amounts of collagen in the dermis during connective tissue repair. It is differentiated from a hypertrophic scar (cicatrix, hypertrophic) in that the former does not spread to surrounding tissues.
  • A thick, irregular scar caused by excessive tissue growth at the site of an incision or wound.
  • An elevated scar, resembling a keloid, but which does not spread into surrounding tissues. It is formed by enlargement and overgrowth of cicatricial tissue and regresses spontaneously.
  • Progressively enlarging scar resulting from formation of excessive amounts of collagen in the dermis during connective tissue repair; spreads to surrounding tissues.
ICD-10-CM L91.0 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert L91.0 to ICD-9-CM

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 L91.0:
  • Type 2 Excludes: L90.5
    , L90.5
    ICD-10-CM Diagnosis Code L90.5

    Scar conditions and fibrosis of skin

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Adherent scar (skin)
    • Cicatrix
    • Disfigurement of skin due to scar
    • Fibrosis of skin NOS
    • Scar NOS
    Type 2 Excludes
    ICD-10-CM Diagnosis Code L90.5

    Scar conditions and fibrosis of skin

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Adherent scar (skin)
    • Cicatrix
    • Disfigurement of skin due to scar
    • Fibrosis of skin NOS
    • Scar NOS
    Type 2 Excludes

Diagnosis Index entries containing back-references to L91.0:
  • Hypertrophy, hypertrophic
    • scar L91.0
  • Kelis L91.0
  • Keloid, cheloid L91.0
    • Hawkin's L91.0
    • scar L91.0
  • Keloma L91.0
  • Scar, scarring L90.5
    - see also Cicatrix
    ICD-10-CM Diagnosis Code L90.5

    Scar conditions and fibrosis of skin

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Adherent scar (skin)
    • Cicatrix
    • Disfigurement of skin due to scar
    • Fibrosis of skin NOS
    • Scar NOS
    Type 2 Excludes
    • cheloid L91.0
    • hypertrophic L91.0
    • keloid L91.0

ICD-10-CM Codes Adjacent To L91.0
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
L93 Lupus erythematosus

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