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N63 Unspecified lump in breast

ICD-10-CM category N63 sits in Chapter 14 (Diseases of the genitourinary system, N00-N99). It contains 17 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

N63.1 Unspecified lump in the right breastN63.2 Unspecified lump in the left breastN63.3 Unspecified lump in axillary tailN63.4 Unspecified lump in breast, subareolar

Billable codes in N63

CodeDescription
N63.0Unspecified lump in unspecified breast
N63.10Unspecified lump in the right breast, unspecified quadrant
N63.11Unspecified lump in the right breast, upper outer quadrant
N63.12Unspecified lump in the right breast, upper inner quadrant
N63.13Unspecified lump in the right breast, lower outer quadrant
N63.14Unspecified lump in the right breast, lower inner quadrant
N63.15Unspecified lump in the right breast, overlapping quadrants
N63.20Unspecified lump in the left breast, unspecified quadrant
N63.21Unspecified lump in the left breast, upper outer quadrant
N63.22Unspecified lump in the left breast, upper inner quadrant
N63.23Unspecified lump in the left breast, lower outer quadrant
N63.24Unspecified lump in the left breast, lower inner quadrant
N63.25Unspecified lump in the left breast, overlapping quadrants
N63.31Unspecified lump in axillary tail of the right breast
N63.32Unspecified lump in axillary tail of the left breast
N63.41Unspecified lump in right breast, subareolar
N63.42Unspecified lump in left breast, subareolar

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