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 | ✓ |
| N63.0 | Unspecified lump in unspecified breast | ✓ |
| N63.1 | Unspecified lump in the right breast | — |
| N63.1 | Unspecified lump in the right breast | — |
| N63.2 | Unspecified lump in the left breast | — |
| N63.2 | Unspecified lump in the left breast | — |
| N63.3 | Unspecified lump in axillary tail | — |
| N63.3 | Unspecified lump in axillary tail | — |
| N63.4 | Unspecified lump in breast, subareolar | — |
| N63.4 | Unspecified lump in breast, subareolar | — |
| N63.10 | Unspecified lump in the right breast, unspecified quadrant | ✓ |
| N63.10 | Unspecified lump in the right breast, unspecified quadrant | ✓ |
| N63.11 | Unspecified lump in the right breast, upper outer quadrant | ✓ |
| N63.11 | Unspecified lump in the right breast, upper outer quadrant | ✓ |
| N63.12 | Unspecified lump in the right breast, upper inner quadrant | ✓ |
| N63.12 | Unspecified lump in the right breast, upper inner quadrant | ✓ |
| N63.13 | Unspecified lump in the right breast, lower outer quadrant | ✓ |
| N63.13 | Unspecified lump in the right breast, lower outer quadrant | ✓ |
| N63.14 | Unspecified lump in the right breast, lower inner quadrant | ✓ |
| N63.14 | Unspecified lump in the right breast, lower inner quadrant | ✓ |
| N63.15 | Unspecified lump in the right breast, overlapping quadrants | ✓ |
| N63.15 | Unspecified lump in the right breast, overlapping quadrants | ✓ |
| N63.20 | Unspecified lump in the left breast, unspecified quadrant | ✓ |
| N63.20 | Unspecified lump in the left breast, unspecified quadrant | ✓ |
| N63.21 | Unspecified lump in the left breast, upper outer quadrant | ✓ |
| N63.21 | Unspecified lump in the left breast, upper outer quadrant | ✓ |
| N63.22 | Unspecified lump in the left breast, upper inner quadrant | ✓ |
| N63.22 | Unspecified lump in the left breast, upper inner quadrant | ✓ |
| N63.23 | Unspecified lump in the left breast, lower outer quadrant | ✓ |
| N63.23 | Unspecified lump in the left breast, lower outer quadrant | ✓ |
| N63.24 | Unspecified lump in the left breast, lower inner quadrant | ✓ |
| N63.24 | Unspecified lump in the left breast, lower inner quadrant | ✓ |
| N63.25 | Unspecified lump in the left breast, overlapping quadrants | ✓ |
| N63.25 | Unspecified lump in the left breast, overlapping quadrants | ✓ |
| N63.31 | Unspecified lump in axillary tail of the right breast | ✓ |
| N63.31 | Unspecified lump in axillary tail of the right breast | ✓ |
| N63.32 | Unspecified lump in axillary tail of the left breast | ✓ |
| N63.32 | Unspecified lump in axillary tail of the left breast | ✓ |
| N63.41 | Unspecified lump in right breast, subareolar | ✓ |
| N63.41 | Unspecified lump in right breast, subareolar | ✓ |
| N63.42 | Unspecified lump in left breast, subareolar | ✓ |
| N63.42 | Unspecified lump in left breast, subareolar | ✓ |
Frequently asked questions
What is ICD-10-CM code N63?
N63 is an ICD-10-CM category covering Unspecified lump in breast. It contains 42 more specific diagnosis codes, 34 of which are billable.
Is N63 a billable code?
No — N63 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example N63.0 — Unspecified lump in unspecified breast). 34 of the 42 codes under N63 are billable.
What codes fall under N63?
N63 includes N63.0, N63.0, N63.1, N63.1, N63.2, plus 37 more. See the full list with descriptions and billable status above.
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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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