2024 ICD-10-CM Diagnosis Code N63.2

Unspecified lump in the left breast

ICD-10-CM Code:
N63.2
ICD-10 Code for:
Unspecified lump in the left breast
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the genitourinary system
    (N00–N99)
    • Disorders of breast
      (N60-N65)
      • Unspecified lump in breast
        (N63)

N63.2 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of unspecified lump in the left breast. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like N63.2 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding Applicable to Unspecified lump in the left breast

Non-specific codes like N63.2 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for unspecified lump in the left breast:

  • Use N63.20 for Unspecified lump in the left breast, unspecified quadrant - BILLABLE CODE

  • Use N63.21 for Unspecified lump in the left breast, upper outer quadrant - BILLABLE CODE

  • Use N63.22 for Unspecified lump in the left breast, upper inner quadrant - BILLABLE CODE

  • Use N63.23 for Unspecified lump in the left breast, lower outer quadrant - BILLABLE CODE

  • Use N63.24 for Unspecified lump in the left breast, lower inner quadrant - BILLABLE CODE

  • Use N63.25 for Unspecified lump in the left breast, overlapping quadrants - BILLABLE CODE

Patient Education


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 in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018