ICD-10-CM Codes
L00-L99
L20-L30
L23-
2023 ICD-10-CM Diagnosis Code L23

2023 ICD-10-CM Diagnosis Code L23

Allergic contact dermatitis

2016

2017

2018

2019

2020

2021

2022

2023

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 2023 edition of ICD-10-CM L23 became effective on October 1, 2022.
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
Applicable To
- Allergic reaction NOS
- Hypersensitivity NOS
T78.40
)
contact dermatitis NOS (
ICD-10-CM Diagnosis Code L25.9
Unspecified contact dermatitis, unspecified cause
Applicable To
- Contact dermatitis (occupational) NOS
- Contact eczema (occupational) NOS
L25.9
)
dermatitis NOS (
ICD-10-CM Diagnosis Code L30.9
Dermatitis, unspecified
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
H01.1-
)
diaper dermatitis (
ICD-10-CM Diagnosis Code L22
Diaper dermatitis
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
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.A Irritant contact dermatitis due to friction o...
    - L24.A0 Irritant contact dermatitis due to friction o...
    - L24.A1 Irritant contact dermatitis due to saliva
    - L24.A2 Irritant contact dermatitis due to fecal, uri...
    - L24.A9 Irritant contact dermatitis due friction or c...
  - L24.B Irritant contact dermatitis related to stoma ...
    - L24.B0 Irritant contact dermatitis related to unspec...
    - L24.B1 Irritant contact dermatitis related to digest...
    - L24.B2 Irritant contact dermatitis related to respir...
    - L24.B3 Irritant contact dermatitis related to fecal ...
L24.-
)
perioral dermatitis (
ICD-10-CM Diagnosis Code L71.0
Perioral dermatitis
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
2023 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
2023 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
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to L23:

Type 1 Excludes: L50
, L25

ICD-10-CM Diagnosis Code L50
Urticaria
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 (D47.01)
ICD-10-CM Diagnosis Code L25
Unspecified contact dermatitis
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)
Type 2 Excludes: L24

ICD-10-CM Diagnosis Code L24
Irritant contact dermatitis
Type 1 Excludes
- allergy NOS (T78.40)
- contact dermatitis NOS (L25.9)
- dermatitis NOS (L30.9)
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.

2023 ICD-10-CM Diagnosis Code L23

Allergic contact dermatitis

Allergy, unspecified

Unspecified contact dermatitis, unspecified cause

Dermatitis, unspecified

Noninfectious dermatoses of eyelid

Diaper dermatitis

Acute noninfective otitis externa

Perioral dermatitis

Radiation-related disorders of the skin and subcutaneous tissue

Diseases of the skin and subcutaneous tissue

Dermatitis and eczema

Urticaria

Unspecified contact dermatitis

Irritant contact dermatitis