L21 is the ICD-10 code for Seborrhoeic dermatitis. It is a three-character category divided into 4 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block L20–L30 (Dermatitis and eczema) in Chapter XII, Diseases of the skin and subcutaneous tissue.
- Code type
- Category (3 characters)
- Chapter
- XII · L00–L99
- Classification
- WHO ICD-10, 2019 version
What L21 excludes
Conditions that look similar but belong under another code.
- infective dermatitis L30.3
Subcodes of L21
L21 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DL21Seborroisk dermatitis
L21Seborrooinen ihottuma (tali-ihottuma)
L21Seborrhoisches Ekzem
L21Dermite séborrhéique
L21seborroïsch eczeem
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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