2027 ICD-10-CM Diagnosis Code N99.860Intraoperative and postprocedural nipple ischemia

ICD-10-CM Codes›N00–N99›N99›N99

ICD-10-CM N99.860
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N99.860 is a billable ICD-10-CM diagnosis code for intraoperative and postprocedural nipple ischemia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 600 through 601.

Code Identity

ICD-10-CM Code
N99.860
Billable Status
Yes — Valid for Submission
Code Describes
Intraoperative and postprocedural nipple ischemia
Short Description
Intraoperative and postprocedural nipple ischemia
Same as the full description in the CMS dataset.
Parent Code
N99.86
Intraoperative and postprocedural complications and disorders of breast

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN99Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
CategoryN99Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
This CodeN99.860Intraoperative and postprocedural nipple ischemia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N99.860: its own notes plus those printed at N99 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From N99 Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified applies to 44 codes
  • irradiation cystitis (N30.4-)
  • postoophorectomy osteoporosis with current pathological fracture (M80.8-)
  • postoophorectomy osteoporosis without current pathological fracture (M81.8)
From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N99.860, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming N99.860: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block T80-T88 Complications of surgical and medical care, not elsewhere classified
    intraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-) names N99.-, which includes this code
  • T81 Complications of procedures, not elsewhere classified
    intraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-) names N99.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Code History & ChangesHistory

New Code N99.860 was added to the ICD-10-CM code set for FY 2027, effective October 1, 2026.

Replacement N99.860 replaces the following previously assigned code(s):

  • N99.89 - Oth postprocedural complications and disorders of GU sys
FY 2027AddedAdded to the ICD-10-CM code setEffective October 1, 2026.
FY 2027CurrentRevised in the current code setEffective October 1, 2026 through September 30, 2027.

Questions About N99.860Overview

What is the ICD-10 code for intraoperative and postprocedural nipple ischemia?

The ICD-10-CM code for intraoperative and postprocedural nipple ischemia is N99.860 (sometimes written as N99860). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N99.860 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report intraoperative and postprocedural nipple ischemia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does N99.860 group to?

When intraoperative and postprocedural nipple ischemia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 600, 601, with relative weights from 0.6014 to 0.9971 depending on complications. Higher weights mean higher Medicare reimbursement.