N63 — Unspecified lump in breast
Is N63 billable?
No — N63 is a non-billable header code. N63 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 17 billable codes beneath N63.
Billable codes under this header
- 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
N63 at a glance
| Code | N63 |
|---|---|
| Description | Unspecified lump in breast |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Inclusion terms
Alternative wording in documentation that is classified to N63.
- Nodule(s) NOS in breast
Excludes1 — never code together — inherited from N60-N65
The conditions below can never be reported together with N63 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- disorders of breast associated with childbirth (O91-O92)
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N63, but a patient may have both at the same time. When documentation supports it, N63 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under N63? (5)
How long has N63 existed?
N63 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2018: N63 stopped being billable
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.