ICD-10-CM Code N64

Other disorders of breast

Version 2020 Non-Billable Code

Not Valid for Submission

N64 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other disorders of breast. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:N64
Short Description:Other disorders of breast
Long Description:Other disorders of breast

Consider the following ICD-10 codes with a higher level of specificity:

  • N64.0 - Fissure and fistula of nipple
  • N64.1 - Fat necrosis of breast
  • N64.2 - Atrophy of breast
  • N64.3 - Galactorrhea not associated with childbirth
  • N64.4 - Mastodynia
  • N64.5 - Other signs and symptoms in breast
  • N64.51 - Induration of breast
  • N64.52 - Nipple discharge
  • N64.53 - Retraction of nipple
  • N64.59 - Other signs and symptoms in breast
  • N64.8 - Other specified disorders of breast
  • N64.81 - Ptosis of breast
  • N64.82 - Hypoplasia of breast
  • N64.89 - Other specified disorders of breast
  • N64.9 - Disorder of breast, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code N64:

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • mechanical complication of breast prosthesis and implant T85.4

Code Classification

  • Diseases of the genitourinary system (N00–N99)
    • Disorders of breast (N60-N65)
      • Other disorders of breast (N64)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Breast Diseases

Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges (fluids that are not breast milk).

If you have a breast lump, pain, discharge or skin irritation, see your health care provider. Minor and serious breast problems have similar symptoms. Although many women fear cancer, most breast problems are not cancer.

Some common breast changes are

  • Fibrocystic breast changes - lumpiness, thickening and swelling, often just before a woman's period
  • Cysts - fluid-filled lumps
  • Fibroadenomas - solid, round, rubbery lumps that move easily when pushed, occurring most in younger women
  • Intraductal papillomas - growths similar to warts near the nipple
  • Blocked milk ducts
  • Milk production when a woman is not breastfeeding

NIH: National Cancer Institute


[Learn More]