World Health Organization · 2026-01 · English
Malignant neoplasms of ill-defined or unspecified primary sites
Official WHO ICD-11 MMS tabulation. This international classification is separate from US ICD-10-CM. For complete instructions and postcoordination, consult the WHO browser.
More specific codes
2D40Adenocarcinoma of unspecified site2D41Unspecified carcinoma of unspecified site2D42Malignant neoplasms of ill-defined sites2D43Malignant neoplasms of independent, multiple primary sites2D44Malignant neoplasm, primary site unknown, so stated2D4YOther specified malignant neoplasms of unspecified primary sites2D4ZUnspecified malignant neoplasms of unspecified sites© World Health Organization · CC BY-ND 3.0 IGO