C09.0 is the ICD-10 code for Malignant neoplasm: Tonsillar fossa. It is a four-character subcategory of C09 (Malignant neoplasm of tonsil), the most specific level in the WHO edition. It belongs to the block C00–C14 (Malignant neoplasms of lip, oral cavity and pharynx) in Chapter II, Neoplasms.
- Code type
- Subcategory (4 characters)
- Chapter
- II · C00–D48
- Classification
- WHO ICD-10, 2019 version
C09.0 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
C09.0Ondartet svulst i tonsilleseng
DC090Kræft i tonsilleje
C09.0Fossa tonsillaris
C09.0Fosse amygdalienne
C09.0tonsil-nis [fossa tonsillaris]
C09.0Malignant neoplasm of tonsillar fossa
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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