ICD-10-CM · Chapter 14 · N00-N99
N63 Unspecified lump in breast
Includes
- Nodule(s) NOS in breast
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| N63..0 | Unspecified lump in unspecified breast | Yes |
| N63..1 | Unspecified lump in the right breast | No |
| N63..10 | Unspecified lump in the right breast, unspecified quadrant | Yes |
| N63..11 | Unspecified lump in the right breast, upper outer quadrant | Yes |
| N63..12 | Unspecified lump in the right breast, upper inner quadrant | Yes |
| N63..13 | Unspecified lump in the right breast, lower outer quadrant | Yes |
| N63..14 | Unspecified lump in the right breast, lower inner quadrant | Yes |
| N63..15 | Unspecified lump in the right breast, overlapping quadrants | Yes |
| N63..2 | Unspecified lump in the left breast | No |
| N63..20 | Unspecified lump in the left breast, unspecified quadrant | Yes |
| N63..21 | Unspecified lump in the left breast, upper outer quadrant | Yes |
| N63..22 | Unspecified lump in the left breast, upper inner quadrant | Yes |
| N63..23 | Unspecified lump in the left breast, lower outer quadrant | Yes |
| N63..24 | Unspecified lump in the left breast, lower inner quadrant | Yes |
| N63..25 | Unspecified lump in the left breast, overlapping quadrants | Yes |
| N63..3 | Unspecified lump in axillary tail | No |
| N63..31 | Unspecified lump in axillary tail of the right breast | Yes |
| N63..32 | Unspecified lump in axillary tail of the left breast | Yes |
| N63..4 | Unspecified lump in breast, subareolar | No |
| N63..41 | Unspecified lump in right breast, subareolar | Yes |
| N63..42 | Unspecified lump in left breast, subareolar | Yes |
Last reviewed: September 2026