L21
Seborrheic dermatitis
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
L21 is a non-billable ICD-10-CM code category for seborrheic dermatitis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are L21.0 Seborrhea capitis; L21.1 Seborrheic infantile dermatitis; L21.8 Other seborrheic dermatitis and L21.9 Seborrheic dermatitis, unspecified. Its coding notes include 20 Excludes2 entries.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (18 notes)
Inherited from L20–L30 Dermatitis and eczema
Inherited from Chapter 12 Diseases of the skin and subcutaneous tissue
- 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.-)
Notes
Also from chapter/block level (1 note)
Inherited from L20–L30 Dermatitis and eczema
- In this block the terms dermatitis and eczema are used synonymously and interchangeably.