ICD-10 Diagnosis Code N64.0

Fissure and fistula of nipple

Diagnosis Code N64.0

ICD-10: N64.0
Short Description: Fissure and fistula of nipple
Long Description: Fissure and fistula of nipple
This is the 2018 version of the ICD-10-CM diagnosis code N64.0

Valid for Submission
The code N64.0 is valid for submission for HIPAA-covered transactions.

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

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code N64.0 is grouped in the following Diagnostic Related Group(s) (MS-DRG V34.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Fissure and fistula of nipple
  • Fissure of nipple
  • Mammary fistula
  • Non-puerperal fistula of nipple
  • On examination - cracked nipple

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

  • Breast - premenstrual tenderness and swelling (Medical Encyclopedia)
  • Breast biopsy -- stereotactic (Medical Encyclopedia)
  • Breast biopsy -- ultrasound (Medical Encyclopedia)
  • Breast infection (Medical Encyclopedia)
  • Breast lump (Medical Encyclopedia)
  • Breast MRI scan (Medical Encyclopedia)
  • Breast pain (Medical Encyclopedia)
  • Breast self exam (Medical Encyclopedia)
  • Breast skin and nipple changes (Medical Encyclopedia)
  • Fibroadenoma - breast (Medical Encyclopedia)
  • Fibrocystic breast disease (Medical Encyclopedia)
  • Gynecomastia (Medical Encyclopedia)
  • Intraductal papilloma (Medical Encyclopedia)
  • Nipple problems (Medical Encyclopedia)



A fistula is an abnormal connection between two parts inside of the body. Fistulas may develop between different organs, such as between the esophagus and the windpipe or the bowel and the vagina. They can also develop between two blood vessels, such as between an artery and a vein or between two arteries.

Some people are born with a fistula. Other common causes of fistulas include

  • Complications from surgery
  • Injury
  • Infection
  • Diseases, such as Crohn's disease or ulcerative colitis

Treatment depends on the cause of the fistula, where it is, and how bad it is. Some fistulas will close on their own. In some cases, you may need antibiotics and/or surgery.

  • Fistula (Medical Encyclopedia)
  • Gastrointestinal fistula (Medical Encyclopedia)

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