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L21 Seborrheic dermatitis

ICD-10-CM category L21 sits in Chapter 12 (Diseases of the skin and subcutaneous tissue, L00-L99). It contains 4 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Billable codes in L21

CodeDescription
L21.0Seborrhea capitis
L21.1Seborrheic infantile dermatitis
L21.8Other seborrheic dermatitis
L21.9Seborrheic dermatitis, unspecified

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