2024 ICD-10-CM Diagnosis Code C50.9

by

Malignant neoplasm of breast of unspecified site

  • C50.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2024 edition of ICD-10-CM C50.9 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of C50.9 – other international versions of ICD-10 C50.9 may differ.

The following code(s) above C50.9 contain annotation back-references

 that may be applicable to C50.9:

  • C00-D49  Neoplasms
  • C50  Malignant neoplasm of breast

Clinical Information

  • A primary or metastatic malignant neoplasm involving the breast. The vast majority of cases are carcinomas arising from the breast parenchyma or the nipple. Malignant breast neoplasms occur more frequently in females than in males.
  • Breast cancer affects one in eight women during their lives. Breast cancer kills more women in the United States than any cancer except lung cancer. No one knows why some women get breast cancer, but there are a number of risk factors. Risks that you cannot change include
    • age – the chance of getting breast cancer rises as a woman gets older
    • genes – there are two genes, brca1 and brca2, that greatly increase the risk. Women who have family members with breast or ovarian cancer may wish to be tested.
    • personal factors – beginning periods before age 12 or going through menopause after age 55
    other risks include being overweight, using hormone replacement therapy (also called menopausal hormone therapy), taking birth control pills, drinking alcohol, not having children or having your first child after age 35 or having dense breasts.symptoms of breast cancer may include a lump in the breast, a change in size or shape of the breast or discharge from a nipple. Breast self-exam and mammography can help find breast cancer early when it is most treatable. Treatment may consist of radiation, lumpectomy, mastectomy, chemotherapy and hormone therapy.men can have breast cancer, too, but the number of cases is small. nih: national cancer institute

Code History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Code annotations containing back-references to C50.9:

  • Type 1 Excludes: N61