Is ICD-10-CM code N99.860 billable?

Yes, N99.860 (Intraoperative and postprocedural nipple ischemia) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2027.

What chapter does ICD-10-CM code N99.860 belong to?

N99.860 belongs to Chapter 14 of the ICD-10-CM tabular list: N00–N99 (Diseases of the Genitourinary System).

Is N99.860 a new ICD-10-CM code for 2027?

Yes, N99.860 was added or revised in the FY2027 ICD-10-CM update, effective October 1, 2026, as published by the Centers for Medicare and Medicaid Services (CMS).

N99.860Billable, valid for claims from October 1, 2026New for FY2027

Intraoperative and postprocedural nipple ischemia

Under N99.86 Intraoperative and postprocedural complications and disorders of breast, chapter 14: Diseases of the Genitourinary System

N99.860 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under N99.86 below.
As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.

Also indexed as: Ischemia, nipple, intraoperative and postprocedural

Instructional notes

Also applies, from N99: Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified

These notes sit on N99 and apply to every code under it, including N99.860.

Excludes2: not included here, code separately if applicable

irradiation cystitis (N30.4-)
postoophorectomy osteoporosis with current pathological fracture (M80.8-)
postoophorectomy osteoporosis without current pathological fracture (M81.8)

Other codes under N99.86

Intraoperative and postprocedural complications and disorders of breast

N99.860Intraoperative and postprocedural nipple ischemia(this code)
N99.861Intraoperative and postprocedural nipple necrosis

MS-DRGs

As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Code history

Added in FY2027 (effective October 1, 2026). Before that, these cases were coded as N99.89 (Other postprocedural complications and disorders of genitourinary system). No changes since.