All ICD10 Codes
N64Not billable, use a more specific code below

Other disorders of breast

In Disorders of breast (N60-N65), chapter 14: Diseases of the Genitourinary System

13 billable codes under N64: none are a CC or MCC; none map to an HCC.

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Instructional notes

Excludes2: not included here, code separately if applicable

  • mechanical complication of breast prosthesis and implant (T85.4-)

Also applies, from Disorders of breast (N60-N65)

These notes sit on N60-N65 and apply to every code under it, including N64.

Excludes1: not coded here, use a different code

  • disorders of breast associated with childbirth (O91-O92)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers chronic kidney disease staging, CKD in kidney transplant patients, and sequencing CKD with related conditions such as diabetes and hypertension.

Read Section I.C.14 (page 62)

All codes under N64

N64 can't be used on a claim. Pick a billable code below; grey headings group them.

N64 MS-DRGs

As the principal diagnosis, all 13 billable codes under N64 group to MS-DRG 600 or 601 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Breast Diseases

Breast diseases include various conditions and changes in your breast. Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges of fluids that are not breast milk.

Read more about breast diseases on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.