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N63.21 Unspecified lump in the left breast, upper outer quadrant
BackN63Unspecified lump in breastCategory5 →N63.0Unspecified lump in unspecified breastCategoryN63.1Unspecified lump in the right breastCategory6 →N63.10Unspecified lump in the right breast, unspecified quadrantCategoryN63.11Unspecified lump in the right breast, upper outer quadrantCategoryN63.12Unspecified lump in the right breast, upper inner quadrantCategoryN63.13Unspecified lump in the right breast, lower outer quadrantCategoryN63.14Unspecified lump in the right breast, lower inner quadrantCategoryN63.15Unspecified lump in the right breast, overlapping quadrantsCategoryN63.2Unspecified lump in the left breastCategory6 →N63.20Unspecified lump in the left breast, unspecified quadrantCategoryN63.21Unspecified lump in the left breast, upper outer quadrantCategoryN63.22Unspecified lump in the left breast, upper inner quadrantCategoryN63.23Unspecified lump in the left breast, lower outer quadrantCategoryN63.24Unspecified lump in the left breast, lower inner quadrantCategoryN63.25Unspecified lump in the left breast, overlapping quadrantsCategoryN63.3Unspecified lump in axillary tailCategory2 →N63.31Unspecified lump in axillary tail of the right breastCategoryN63.32Unspecified lump in axillary tail of the left breastCategoryN63.4Unspecified lump in breast, subareolarCategory2 →N63.41Unspecified lump in right breast, subareolarCategoryN63.42Unspecified lump in left breast, subareolarCategory
CategoryCODABLE
N63.21
Unspecified lump in the left breast, upper outer quadrant
- Chapter
- XIV · Diseases of the genitourinary system
- Section
- N60-N65
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.