2019 ICD-10-CM Diagnosis Code L23

Allergic contact dermatitis

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • L23 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2019 edition of ICD-10-CM L23 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of L23 - other international versions of ICD-10 L23 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as L23. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • allergy NOS (
    ICD-10-CM Diagnosis Code T78.40

    Allergy, unspecified

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Applicable To
    • Allergic reaction NOS
    • Hypersensitivity NOS
    T78.40
    )
  • contact dermatitis NOS (
    ICD-10-CM Diagnosis Code L25.9

    Unspecified contact dermatitis, unspecified cause

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Contact dermatitis (occupational) NOS
    • Contact eczema (occupational) NOS
    L25.9
    )
  • dermatitis NOS (
    ICD-10-CM Diagnosis Code L30.9

    Dermatitis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Eczema NOS
    L30.9
    )
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 (L23) and the excluded code together.
  • dermatitis due to substances taken internally (
    ICD-10-CM Diagnosis Code L27
    • L27 Dermatitis due to substances taken internally...
      • L27.0 Generalized skin eruption due to drugs and me...
      • L27.1 Localized skin eruption due to drugs and medi...
      • L27.2 Dermatitis due to ingested food
      • L27.8 Dermatitis due to other substances taken inte...
      • L27.9 Dermatitis due to unspecified substance taken...
    L27.-
    )
  • dermatitis of eyelid (
    ICD-10-CM Diagnosis Code H01.1

    Noninfectious dermatoses of eyelid

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    H01.1-
    )
  • diaper dermatitis (
    ICD-10-CM Diagnosis Code L22

    Diaper dermatitis

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Diaper erythema
    • Diaper rash
    • Psoriasiform diaper rash
    L22
    )
  • eczema of external ear (
    ICD-10-CM Diagnosis Code H60.5

    Acute noninfective otitis externa

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    H60.5-
    )
  • irritant contact dermatitis (
    ICD-10-CM Diagnosis Code L24
    • L24 Irritant contact dermatitis
      • L24.0 Irritant contact dermatitis due to detergents...
      • L24.1 Irritant contact dermatitis due to oils and g...
      • 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 c...
      • L24.5 Irritant contact dermatitis due to other chem...
      • L24.6 Irritant contact dermatitis due to food in co...
      • L24.7 Irritant contact dermatitis due to plants, ex...
      • L24.8 Irritant contact dermatitis due to other agen...
        • L24.81 Irritant contact dermatitis due to metals
        • L24.89 Irritant contact dermatitis due to other agen...
      • L24.9 Irritant contact dermatitis, unspecified caus...
    L24.-
    )
  • perioral dermatitis (
    ICD-10-CM Diagnosis Code L71.0

    Perioral dermatitis

      2016 2017 2018 2019 Billable/Specific Code
    L71.0
    )
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59
    ICD-10-CM Range L55-L59

    Radiation-related disorders of the skin and subcutaneous tissue

    • L55 Sunburn
    • L56 Other acute skin changes due to ultravio...
    • L57 Skin changes due to chronic exposure to ...
    • L58 Radiodermatitis
    • L59 Other disorders of skin and subcutaneous...
    )
The following code(s) above L23 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:
  • L00-L99
    2019 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
    2019 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
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.
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
Code annotations containing back-references to L23:
  • Type 1 Excludes: L25
    , L50
    ICD-10-CM Diagnosis Code L25

    Unspecified contact dermatitis

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic contact dermatitis (L23.-)
    • allergy NOS (T78.40)
    • dermatitis NOS (L30.9)
    • irritant contact dermatitis (L24.-)
    Type 2 Excludes
    • dermatitis due to ingested substances (L27.-)
    • dermatitis of eyelid (H01.1-)
    • eczema of external ear (H60.5-)
    • perioral dermatitis (L71.0)
    • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
    ICD-10-CM Diagnosis Code L50

    Urticaria

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic contact dermatitis (L23.-)
    • angioneurotic edema (T78.3)
    • giant urticaria (T78.3)
    • hereditary angio-edema (D84.1)
    • Quincke's edema (T78.3)
    • serum urticaria (T80.6-)
    • solar urticaria (L56.3)
    • urticaria neonatorum (P83.8)
    • urticaria papulosa (L28.2)
    • urticaria pigmentosa (Q82.2)
  • Type 2 Excludes: L24
    ICD-10-CM Diagnosis Code L24

    Irritant contact dermatitis

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    • allergic contact dermatitis (L23.-)
    • dermatitis due to substances taken internally (L27.-)
    • dermatitis of eyelid (H01.1-)
    • diaper dermatitis (L22)
    • eczema of external ear (H60.5-)
    • perioral dermatitis (L71.0)
    • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
ICD-10-CM Codes Adjacent To L23
L20.83 Infantile (acute) (chronic) eczema
L20.84 Intrinsic (allergic) eczema
L20.89 Other atopic dermatitis
L20.9 Atopic dermatitis, unspecified
L21 Seborrheic dermatitis
L21.0 Seborrhea capitis
L21.1 Seborrheic infantile dermatitis
L21.8 Other seborrheic dermatitis
L21.9 Seborrheic dermatitis, unspecified
L22 Diaper dermatitis
L23 Allergic contact dermatitis
L23.0 Allergic contact dermatitis due to metals
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

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