Is ICD-10-CM code N99.86 billable?

No, N99.86 (Intraoperative and postprocedural complications and disorders of breast) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code N99.86 belong to?

N99.86 belongs to Chapter 14 of the ICD-10-CM tabular list: N00–N99 (Diseases of the Genitourinary System).

N99.86Not billable, use a more specific code below

Intraoperative and postprocedural complications and disorders of breast

Under N99.8 Other intraoperative and postprocedural complications and disorders of genitourinary system, chapter 14: Diseases of the Genitourinary System

2 billable codes under N99.86: none are a CC or MCC; none map to an HCC.

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 N99.86.

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)

All codes under N99.86

N99.86 can't be used on a claim. Pick a billable code below; grey headings group them.

MS-DRGs

As the principal diagnosis, all 2 billable codes under N99.86 group 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). No changes since.