ICD-10-CM 2027
ICD-10 code for lump
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Lump”. Page updated September 29, 2026.
About coding lump
The official ICD-10-CM index doesn't give a single default code for lump; the code depends on the details below.
More specific lump codes (official index)
- breast N63.0 — Unspecified lump in unspecified breast
- axillary tail
- left N63.32 — Unspecified lump in axillary tail of the left breast
- right N63.31 — Unspecified lump in axillary tail of the right breast
- left
- lower inner quadrant N63.24 — Unspecified lump in the left breast, lower inner quadrant
- lower outer quadrant N63.23 — Unspecified lump in the left breast, lower outer quadrant
- overlapping quadrants N63.25 — Unspecified lump in the left breast, overlapping quadrants
- unspecified quadrant N63.20 — Unspecified lump in the left breast, unspecified quadrant
- upper inner quadrant N63.22 — Unspecified lump in the left breast, upper inner quadrant
- upper outer quadrant N63.21 — Unspecified lump in the left breast, upper outer quadrant
- right
- lower inner quadrant N63.14 — Unspecified lump in the right breast, lower inner quadrant
- lower outer quadrant N63.13 — Unspecified lump in the right breast, lower outer quadrant
- overlapping quadrants N63.15 — Unspecified lump in the right breast, overlapping quadrants
- unspecified quadrant N63.10 — Unspecified lump in the right breast, unspecified quadrant
- upper inner quadrant N63.12 — Unspecified lump in the right breast, upper inner quadrant
- upper outer quadrant N63.11 — Unspecified lump in the right breast, upper outer quadrant
- subareolar
- left N63.42 — Unspecified lump in left breast, subareolar
- right N63.41 — Unspecified lump in right breast, subareolar
Common questions about lump ICD-10 codes
What is the ICD-10 code for breast lump?
- N63.0 — Unspecified lump in unspecified breast.