N63: Unspecified lump in breast

Codes under N63 (Unspecified lump in breast). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
N63.0	Unspecified lump in unspecified breast	✓
N63.1	Unspecified lump in the right breast	—
N63.2	Unspecified lump in the left breast	—
N63.3	Unspecified lump in axillary tail	—
N63.4	Unspecified lump in breast, subareolar	—
N63.10	Unspecified lump in the right breast, unspecified quadrant	✓
N63.11	Unspecified lump in the right breast, upper outer quadrant	✓
N63.12	Unspecified lump in the right breast, upper inner quadrant	✓
N63.13	Unspecified lump in the right breast, lower outer quadrant	✓
N63.14	Unspecified lump in the right breast, lower inner quadrant	✓
N63.15	Unspecified lump in the right breast, overlapping quadrants	✓
N63.20	Unspecified lump in the left breast, unspecified quadrant	✓
N63.21	Unspecified lump in the left breast, upper outer quadrant	✓
N63.22	Unspecified lump in the left breast, upper inner quadrant	✓
N63.23	Unspecified lump in the left breast, lower outer quadrant	✓
N63.24	Unspecified lump in the left breast, lower inner quadrant	✓
N63.25	Unspecified lump in the left breast, overlapping quadrants	✓
N63.31	Unspecified lump in axillary tail of the right breast	✓
N63.32	Unspecified lump in axillary tail of the left breast	✓
N63.41	Unspecified lump in right breast, subareolar	✓
N63.42	Unspecified lump in left breast, subareolar	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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