ICD-10 diagnosis code

N63 Unspecified lump in breast

N63 is the ICD-10 code for Unspecified lump in breast. It is a three-character category that is not subdivided further. It belongs to the block N60–N64 (Disorders of breast) in Chapter XIV, Diseases of the genitourinary system.

Code type: Category (3 characters)
Chapter: XIV · N00–N99
Classification: WHO ICD-10, 2019 version

What N63 includes

Conditions and terms that are coded here.

Nodule(s) NOS in breast

N63 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

N63Ospecificerad knuta i bröstkörtel

N63.9Ospecificerad knuta i bröstkörtel

NorwayICD-10-NO

N63Uspesifisert klump i bryst

DenmarkICD-10-DK

DN63Knude i bryst UNS

DN639Mammatumor UNS

FinlandICD-10-FI

N63Määrittämätön rintarauhasen kyhmy

GermanyICD-10-GM

N63Nicht näher bezeichnete Knoten in der Mamma [Brustdrüse]

FranceICD-10-FR

N63Tuméfaction mammaire, sans précision

NetherlandsICD-10-NL

N63palpabele weerstand in mamma, niet-gespecificeerd

United StatesICD-10-CM

Listed through more specific codes:

N63.0Unspecified lump in unspecified 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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