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ICD-10 diagnosis code

C50.3 Malignant neoplasm: Lower-inner quadrant of breast

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C50.3 is the ICD-10 code for Malignant neoplasm: Lower-inner 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

C50.3 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

C50.3Malign tumör i nedre inre kvadranten av bröstkörteln

NorwayICD-10-NO

C50.3Ondartet svulst i nedre indre kvadrant av bryst

DenmarkICD-10-DK

DC503Brystkræft i den nedre mediale kvadrant af mamma

FinlandICD-10-FI

C50.3Rinnan alasisäneljänneksen syöpä

GermanyICD-10-GM

C50.3Unterer innerer Quadrant der Brustdrüse

FranceICD-10-FR

C50.3Quadrant inféro-interne du sein

NetherlandsICD-10-NL

C50.3binnenste onderkwadrant van mamma

United StatesICD-10-CM

Listed through more specific codes:

  • C50.311Malignant neoplasm of lower-inner quadrant of right female breast
  • C50.312Malignant neoplasm of lower-inner quadrant of left female breast
  • C50.319Malignant neoplasm of lower-inner quadrant of unspecified female breast
  • C50.321Malignant neoplasm of lower-inner quadrant of right male breast
  • C50.322Malignant neoplasm of lower-inner quadrant of left male breast
  • C50.329Malignant neoplasm of lower-inner 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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