2019 ICD-10-CM Diagnosis Code L21.9

Seborrheic dermatitis, unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • L21.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM L21.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of L21.9 - other international versions of ICD-10 L21.9 may differ.
Applicable To
  • Seborrhea NOS
The following code(s) above L21.9 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 L21.9:
  • 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
  • L21
    ICD-10-CM Diagnosis Code L21

    Seborrheic dermatitis

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • infective dermatitis (L30.3)
    • seborrheic keratosis (L82.-)
    Seborrheic dermatitis
Approximate Synonyms
  • Seborrhea
  • Seborrheic dermatitis
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
ICD-10-CM L21.9 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert L21.9 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

Diagnosis Index entries containing back-references to L21.9:

ICD-10-CM Codes Adjacent To L21.9
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
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

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