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ICD-10 diagnosis code

C50.5 Malignant neoplasm: Lower-outer quadrant of breast

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C50.5 is the ICD-10 code for Malignant neoplasm: Lower-outer quadrant of breast. 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

C50.5 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

C50.5Malign tumör i nedre yttre kvadranten av bröstkörteln

NorwayICD-10-NO

C50.5Ondartet svulst i nedre ytre kvadrant av bryst

DenmarkICD-10-DK

DC505Brystkræft i den nedre laterale kvadrant af mamma

FinlandICD-10-FI

C50.5Rinnan alasivuneljänneksen syöpä

GermanyICD-10-GM

C50.5Unterer äußerer Quadrant der Brustdrüse

FranceICD-10-FR

C50.5Quadrant inféroexterne du sein

NetherlandsICD-10-NL

C50.5buitenste onderkwadrant van mamma

United StatesICD-10-CM

Listed through more specific codes:

  • C50.511Malignant neoplasm of lower-outer quadrant of right female breast
  • C50.512Malignant neoplasm of lower-outer quadrant of left female breast
  • C50.519Malignant neoplasm of lower-outer quadrant of unspecified female breast
  • C50.521Malignant neoplasm of lower-outer quadrant of right male breast
  • C50.522Malignant neoplasm of lower-outer quadrant of left male breast
  • C50.529Malignant neoplasm of lower-outer quadrant 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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