C80.0 is the ICD-10 code for Malignant neoplasm, primary site unknown, so stated. 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 C80.0 includes
Conditions and terms that are coded here.
- Primary site unknown
C80.0 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
C80.0Ondartet svulst med utgangspunkt angitt som ukjent
DC800Primær kræftsygdom uden kendt lokalisation
C80.0Bösartige Neubildung, primäre Lokalisation unbekannt, so bezeichnet
C80.0Tumeur maligne de siège primitif inconnu, ainsi décrit
C80.0maligne neoplasma, primaire lokalisatie onbekend, als zodanig vermeld
C80.0Disseminated malignant neoplasm, 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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