2022 ICD-10-CM Diagnosis Code C50.9: Malignant Neoplasm Of ...

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2026

  1. ICD-10-CM Codes
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  2. C00-D49
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  3. C50-C50
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  4. C50-
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  5. 2026 ICD-10-CM Diagnosis Code C50.9
2026 ICD-10-CM Diagnosis Code C50.9

Malignant neoplasm of breast of unspecified site

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
  • C50.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2026 edition of ICD-10-CM C50.9 became effective on October 1, 2025.
  • 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-referencesAnnotation Back-ReferencesIn this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to C50.9:
  • C00-D49 2026 ICD-10-CM Range C00-D49

    NeoplasmsNote
    • Functional activity
    • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
    • Morphology [Histology]
    • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
    • Primary malignant neoplasms overlapping site boundaries
    • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
    • Malignant neoplasm of ectopic tissue
    • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
    Neoplasms

  • C50 ICD-10-CM Diagnosis Code C50

    Malignant neoplasm of breast

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    Includes
    • connective tissue of breast
    • Paget's disease of breast
    • Paget's disease of nipple
    Type 1 Excludes
    • skin of breast (C44.501, C44.511, C44.521, C44.591)
    Use Additional
    • code to identify estrogen, and other hormones and factors receptor status (Z17.-)
    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
  • 2025 (effective 10/1/2024): No change
  • 2026 (effective 10/1/2025): No change
ICD-10-CM Codes Adjacent To C50.9 C50.629 Malignant neoplasm of axillary tail of unspecified male breast C50.8 Malignant neoplasm of overlapping sites of breast C50.81 Malignant neoplasm of overlapping sites of breast, female C50.811 Malignant neoplasm of overlapping sites of right female breast C50.812 Malignant neoplasm of overlapping sites of left female breast C50.819 Malignant neoplasm of overlapping sites of unspecified female breast C50.82 Malignant neoplasm of overlapping sites of breast, male C50.821 Malignant neoplasm of overlapping sites of right male breast C50.822 Malignant neoplasm of overlapping sites of left male breast C50.829 Malignant neoplasm of overlapping sites of unspecified male breast C50.9 Malignant neoplasm of breast of unspecified site C50.91 Malignant neoplasm of breast of unspecified site, female C50.911 Malignant neoplasm of unspecified site of right female breast C50.912 Malignant neoplasm of unspecified site of left female breast C50.919 Malignant neoplasm of unspecified site of unspecified female breast C50.92 Malignant neoplasm of breast of unspecified site, male C50.921 Malignant neoplasm of unspecified site of right male breast C50.922 Malignant neoplasm of unspecified site of left male breast C50.929 Malignant neoplasm of unspecified site of unspecified male breast C50.A Malignant inflammatory neoplasm of breast C50.A0 Malignant inflammatory neoplasm of unspecified breast

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