N60.99 — Unspecified benign mammary dysplasia of unspecified breast
Is N60.99 billable?
Yes, but N60.99 is an unspecified code. N60.99 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, N60.99 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 N60.99 — the more specific alternatives are listed below.
N60.99 at a glance
| Code | N60.99 |
|---|---|
| Description | Unspecified benign mammary dysplasia of unspecified breast |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does N60.99 group to?
N60.99 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 N60.99 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under N60.9, the nearest indexed parent of N60.99. Use them to find the family, then select the specific code.
- Dysplasia › mammary
- Hyperplasia, hyperplastic › breast › atypical, atypia
- Hyperplasia, hyperplastic › breast › atypical, atypia › ductal
- Hyperplasia, hyperplastic › breast › atypical, atypia › lobular
Excludes1 — never code together — inherited from N60-N65
The conditions below can never be reported together with N60.99 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 N60.99, but a patient may have both at the same time. When documentation supports it, N60.99 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 N60.99 existed?
N60.99 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.