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  2. ICD-10-CM Codes List
  3. N00–N99
  4. N60-N65
  5. Other disorders of breast (N64)

Other disorders of breast (N64)

The ICD-10 code section N64 covers a variety of nonmalignant breast conditions that are not classified elsewhere, including issues affecting the nipple, breast tissue, and lactation. These codes help identify specific breast disorders such as nipple fissures, fat necrosis, and other symptoms like nipple discharge or breast pain.

This section includes codes for conditions like N64.0 (fissure and fistula of nipple), known by synonyms such as "bilateral cracked nipples" and "fissure of nipple," which document nipple lesions and cracks. N64.1 codes for fat necrosis of the breast, capturing localized breast tissue death without malignancy. Pain-related codes such as N64.4 (mastodynia) cover various types of breast pain, from cyclical tenderness to persistent mastalgia. Other notable codes include N64.52 for nipple discharge with numerous discharge types (milky, bloody, purulent) and N64.53 for nipple retraction. The section also provides codes for conditions like breast atrophy, galactorrhea unrelated to childbirth, and ptosis. When unspecified breast disorders occur, N64.9 serves as a general code for breast or nipple problems not otherwise detailed. These codes assist healthcare professionals and coders in accurately documenting diverse breast conditions and symptoms, vital for treatment and insurance purposes.

Instructional Notations

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

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Mastectomy

Surgical procedure to remove one or both breasts.

Mastodynia

Pain in the breast generally classified as cyclical (associated with menstrual periods), or noncyclical, i.e. originating from the breast or nearby muscles or joints, ranging from minor discomfort to severely incapacitating.

Nipple Discharge

Fluid that seeps out of one or both nipples of the breast.

Seroma

Tumor-like sterile accumulation of serum in a tissue, organ, or cavity. It results from a tissue insult and is the product of tissue inflammation. It most commonly occurs following MASTECTOMY.