ICD-10-CM Code N64.59

Other signs and symptoms in breast

Version 2020 Billable Code OB/GYN

Valid for Submission

N64.59 is a billable code used to specify a medical diagnosis of other signs and symptoms in breast. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code N64.59 might also be used to specify conditions or terms like absent nipple, areolas unequal in size, bilateral inversion of nipple, bleeding from breast, bleeding from nipple, bleeding of surface of nipple, etc

The code is commonly used in ob/gyn medical specialties to specify clinical concepts such as lump in breast and other disorders of the breast.

Short Description:Other signs and symptoms in breast
Long Description:Other signs and symptoms in breast

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code N64.59 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Absent nipple
  • Areolas unequal in size
  • Bilateral inversion of nipple
  • Bleeding from breast
  • Bleeding from nipple
  • Bleeding of surface of nipple
  • Breast changes
  • Breast cold
  • Breast depigmented
  • Breast disc palpable
  • Breast hot
  • Breast hypopigmented
  • Breast pigmented
  • Breast signs and symptoms
  • Breast symptom of change in nipple
  • Breast symptom of change in skin
  • Breast temperature - finding
  • Breast temperature - finding
  • Breasts asymmetrical
  • Chest swelling
  • Chest swelling
  • Complex sclerosing lesion of breast
  • Contour of breast distorted
  • Deformation of breast
  • Deformity of breast
  • Deformity of breast
  • Destructive lesion of nipple
  • Dimpling of surface of breast
  • Discoloration of nipple
  • Discoloration of skin of breast
  • Displacement of nipple
  • Edema of breast
  • Edema of nipple
  • Engorgement of breasts
  • Finding of color of breast
  • Finding of color of breast
  • Finding of color of breast
  • Finding of color of breast
  • Finding of color of breast
  • Finding of color of nipple
  • Finding of color of nipple
  • Finding of color of nipple
  • Finding of color of nipple
  • Finding of consistency of breast
  • Finding of flow of breast milk
  • Finding of form of nipple
  • Finding of pattern of breast function
  • Finding of proportion of nipple
  • Finding of quantity of lactation
  • Finding of sensation of nipple
  • Flat nipple
  • Hair sinus
  • Hair sinus of breast
  • Increase in surface veins of breast
  • Inversion of nipple
  • Inversion of nipple
  • Lactiferous duct palpable
  • Lactiferous duct prominent
  • Lactiferous ducts finding
  • Lactiferous ducts finding
  • Large areola
  • Large nipple
  • Lesion of nipple
  • Milk leaking from breast
  • Nipple bleeding
  • Nipple deformity
  • Nipple deformity
  • Nipple depigmented
  • Nipple hypopigmented
  • Nipples unequal in size
  • O/E - breast asymmetry
  • O/E - breast swollen
  • O/E - nipple discharge
  • O/E - peau d'orange
  • O/E - veins visible on breast
  • On examination - nipple discharge-blood-dark
  • Peau d'orange surface of breast
  • Position of nipple - finding
  • Red breast
  • Red nipple
  • Shape of breasts unequal
  • Sinus of breast
  • Size of breast - finding
  • Size of breasts unequal
  • Size of nipple - finding
  • Size of nipple - finding
  • Small breast
  • Small nipple
  • Soft breast
  • Sore nipple
  • Surface characteristics of breast - finding
  • Surface characteristics of breast - finding
  • Swelling of breast
  • Swelling of breast
  • Swelling of nipple
  • Symmetry of breasts - finding
  • Thickening of skin
  • Thickening of skin of breast
  • Veins visible on breast
  • Wide spaced nipples

Diagnostic Related Groups

The ICD-10 code N64.59 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert N64.59 to ICD-9

  • 611.79 - Symptoms in breast NEC (Approximate Flag)

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]