C80.9 is the ICD-10 code for Malignant neoplasm, primary site unspecified. It is a four-character subcategory of C80 (Malignant neoplasm, without specification of site), the most specific level in the WHO edition. It belongs to the block C76–C80 (Malignant neoplasms of ill-defined, secondary and unspecified sites) in Chapter II, Neoplasms.
- Code type
- Subcategory (4 characters)
- Chapter
- II · C00–D48
- Classification
- WHO ICD-10, 2019 version
What C80.9 includes
Conditions and terms that are coded here.
- Cancer NOS
- Carcinoma NOS
- Malignancy NOS
- Malignant cachexia NOS
- Multiple cancer NOS
What C80.9 excludes
Conditions that look similar but belong under another code.
C80.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
C80.9Ondartet svulst med uspesifisert utgangspunkt
DC809Kræftsygdom UNS
- DC809AMalign kakeksi
C80.9Bösartige Neubildung, nicht näher bezeichnet
C80.9Tumeur maligne de siège primitif non précisé
C80.9maligne neoplasma, primaire lokalisatie niet-gespecificeerd
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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