L21.9 is the ICD-10 code for Seborrhoeic dermatitis, unspecified. It is a four-character subcategory of L21 (Seborrhoeic dermatitis), the most specific level in the WHO edition. It belongs to the block L20–L30 (Dermatitis and eczema) in Chapter XII, Diseases of the skin and subcutaneous tissue.
- Code type
- Subcategory (4 characters)
- Chapter
- XII · L00–L99
- Classification
- WHO ICD-10, 2019 version
L21.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
L21.9Uspesifisert seboréisk dermatitt
DL219Seborroisk dermatitis UNS
L21.9Määrittämätön seborrooinen ihottuma
L21.9Seborrhoisches Ekzem, nicht näher bezeichnet
L21.9Dermite séborrhéique, sans précision
L21.9seborroïsch eczeem, niet-gespecificeerd
L21.9Seborrheic dermatitis, unspecified
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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