2020 ICD-10-CM Diagnosis Code L21

Seborrheic dermatitis

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • L21 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 L21 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of L21 - other international versions of ICD-10 L21 may differ.
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 (L21) and the excluded code together.
  • infective dermatitis (
    ICD-10-CM Diagnosis Code L30.3

    Infective dermatitis

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Infectious eczematoid dermatitis
    L30.3
    )
  • seborrheic keratosis (
    ICD-10-CM Diagnosis Code L82
    • L82 Seborrheic keratosis
      • L82.0 Inflamed seborrheic keratosis
      • L82.1 Other seborrheic keratosis
    L82.-
    )
The following code(s) above L21 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 L21:
  • 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
Clinical Information
  • A chronic inflammatory disease of the skin with unknown etiology. It is characterized by moderate erythema, dry, moist, or greasy (sebaceous gland) scaling and yellow crusted patches on various areas, especially the scalp, that exfoliate as dandruff. Seborrheic dermatitis is common in children and adolescents with hiv infections.
  • A kind of skin disorder affecting the scalp, face, and trunk causing scaly, flaky, itchy, red skin
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 L21:
  • Type 2 Excludes: L82
    ICD-10-CM Diagnosis Code L82

    Seborrheic keratosis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Includes
    • basal cell papilloma
    • dermatosis papulosa nigra
    • Leser-Trélat disease
    Type 2 Excludes
    • seborrheic dermatitis (L21.-)
ICD-10-CM Codes Adjacent To L21
L14 Bullous disorders in diseases classified elsewhere
L20 Atopic dermatitis
L20.0 Besnier's prurigo
L20.8 Other atopic dermatitis
L20.81 Atopic neurodermatitis
L20.82 Flexural eczema
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

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