N63.32 — Unspecified lump in axillary tail of the left breast
Is N63.32 billable?
Yes, but N63.32 is an unspecified code. N63.32 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, N63.32 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting N63.32 — the more specific alternatives are listed below.
More specific alternatives
N63.32 at a glance
| Code | N63.32 |
|---|---|
| Description | Unspecified lump in axillary tail of the left breast |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does N63.32 group to?
N63.32 sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 600Non-Malignant Breast Disorders with CC/MCCmedical
- 601Non-Malignant Breast Disorders without CC/MCCmedical
How is N63.32 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to N63.32. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Lump › breast › axillary tail › left
Excludes1 — never code together — inherited from N60-N65
The conditions below can never be reported together with N63.32 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 N63.32, but a patient may have both at the same time. When documentation supports it, N63.32 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)
How long has N63.32 existed?
N63.32 first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.