2020 ICD-10-CM Diagnosis Code L23.9

Allergic contact dermatitis, unspecified cause

    2016 2017 2018 2019 2020 Billable/Specific Code
  • L23.9 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 L23.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L23.9 - other international versions of ICD-10 L23.9 may differ.
Applicable To
  • Allergic contact eczema NOS
The following code(s) above L23.9 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 L23.9:
  • 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
  • L20-L30
    2020 ICD-10-CM Range L20-L30

    Dermatitis and eczema

    Note
    • In this block the terms dermatitis and eczema are used synonymously and interchangeably.
    Type 2 Excludes
    • chronic (childhood) granulomatous disease (D71)
    • dermatitis gangrenosa (L08.0)
    • dermatitis herpetiformis (L13.0)
    • dry skin dermatitis (L85.3)
    • factitial dermatitis (L98.1)
    • perioral dermatitis (L71.0)
    • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
    • stasis dermatitis (I87.2)
    Dermatitis and eczema
  • L23
    ICD-10-CM Diagnosis Code L23

    Allergic contact dermatitis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    • dermatitis due to substances taken internally (L27.-)
    • dermatitis of eyelid (H01.1-)
    • diaper dermatitis (L22)
    • eczema of external ear (H60.5-)
    • irritant contact dermatitis (L24.-)
    • perioral dermatitis (L71.0)
    • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
    Allergic contact dermatitis
Approximate Synonyms
  • Allergic contact dermatitis
Clinical Information
  • A contact dermatitis due to allergic sensitization to various substances. These substances subsequently produce inflammatory reactions in the skin of those who have acquired hypersensitivity to them as a result of prior exposure.
ICD-10-CM L23.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert L23.9 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

Diagnosis Index entries containing back-references to L23.9:
  • Dermatitis (eczematous) L30.9
    ICD-10-CM Diagnosis Code L30.9

    Dermatitis, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Eczema NOS
    • contact (occupational) L25.9
      ICD-10-CM Diagnosis Code L25.9

      Unspecified contact dermatitis, unspecified cause

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Contact dermatitis (occupational) NOS
      • Contact eczema (occupational) NOS
    • sensitization NOS L23.9

ICD-10-CM Codes Adjacent To L23.9
L23.1 Allergic contact dermatitis due to adhesives
L23.2 Allergic contact dermatitis due to cosmetics
L23.3 Allergic contact dermatitis due to drugs in contact with skin
L23.4 Allergic contact dermatitis due to dyes
L23.5 Allergic contact dermatitis due to other chemical products
L23.6 Allergic contact dermatitis due to food in contact with the skin
L23.7 Allergic contact dermatitis due to plants, except food
L23.8 Allergic contact dermatitis due to other agents
L23.81 Allergic contact dermatitis due to animal (cat) (dog) dander
L23.89 Allergic contact dermatitis due to other agents
L23.9 Allergic contact dermatitis, unspecified cause
L24 Irritant contact dermatitis
L24.0 Irritant contact dermatitis due to detergents
L24.1 Irritant contact dermatitis due to oils and greases
L24.2 Irritant contact dermatitis due to solvents
L24.3 Irritant contact dermatitis due to cosmetics
L24.4 Irritant contact dermatitis due to drugs in contact with skin
L24.5 Irritant contact dermatitis due to other chemical products
L24.6 Irritant contact dermatitis due to food in contact with skin
L24.7 Irritant contact dermatitis due to plants, except food
L24.8 Irritant contact dermatitis due to other agents

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