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ICD-10 diagnosis code

C50.9 Malignant neoplasm: Breast, unspecified

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C50.9 is the ICD-10 code for Malignant neoplasm: Breast, unspecified. It is a four-character subcategory of C50 (Malignant neoplasm of breast), the most specific level in the WHO edition. It belongs to the block C50–C50 (Malignant neoplasm of breast) in Chapter II, Neoplasms.

Code type
Subcategory (4 characters)
Chapter
II · C00–D48
Classification
WHO ICD-10, 2019 version

C50.9 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

C50.9Ospecificerad lokalisation av malign tumör i bröstkörtel

NorwayICD-10-NO

C50.9Ondartet svulst med uspesifisert lokalisasjon i bryst

DenmarkICD-10-DK

DC509Brystkræft UNS

FinlandICD-10-FI

C50.9Muun tai määrittämättömän paikan rintasyöpä

GermanyICD-10-GM

C50.9Brustdrüse, nicht näher bezeichnet

FranceICD-10-FR

C50.9Sein, sans précision

NetherlandsICD-10-NL

C50.9mamma, niet-gespecificeerd

United StatesICD-10-CM

Listed through more specific codes:

  • C50.911Malignant neoplasm of unspecified site of right female breast
  • C50.912Malignant neoplasm of unspecified site of left female breast
  • C50.919Malignant neoplasm of unspecified site of unspecified female breast
  • C50.921Malignant neoplasm of unspecified site of right male breast
  • C50.922Malignant neoplasm of unspecified site of left male breast
  • C50.929Malignant neoplasm of unspecified site of unspecified male breast

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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