2022 ICD-10-CM Diagnosis Code C50.919: 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 C50.919
2026 ICD-10-CM Diagnosis Code C50.919

Malignant neoplasm of unspecified site of unspecified female breast

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code Female Dx
  • C50.919 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Malignant neoplasm of unsp site of unspecified female breast
  • The 2026 edition of ICD-10-CM C50.919 became effective on October 1, 2025.
  • This is the American ICD-10-CM version of C50.919 - other international versions of ICD-10 C50.919 may differ.
ICD-10-CM Coding Rules
  • C50.919 is applicable to female patients.
The following code(s) above C50.919 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 C50.919:
  • 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
Approximate Synonyms
  • Breast cancer
  • Breast cancer metastatic to lymph node
  • Cancer female breast malig cystosarcoma phyllodes
  • Cancer of the female breast
  • Cancer of the female breast, infiltrating ductal
  • Cancer of the female breast, infiltrating lobular
  • Cancer of the female breast, recurrent
  • Cancer, breast, invasive, female
  • Female breast cancer metastatic to lymph node
  • Female breast cancer metastatic to unspecified site
  • Female breast cancer with metastasis to eye
  • Female inflammatory breast cancer
  • Infiltrating duct carcinoma of breast
  • Infiltrating ductal carcinoma of breast, stage 1
  • Infiltrating ductal carcinoma of breast, stage 2
  • Infiltrating ductal carcinoma of breast, stage 3
  • Infiltrating ductal carcinoma of breast, stage 4
  • Infiltrating ductal carcinoma of female breast, stage 1
  • Infiltrating ductal carcinoma of female breast, stage 2
  • Infiltrating ductal carcinoma of female breast, stage 3
  • Infiltrating ductal carcinoma of female breast, stage 4
  • Infiltrating lobular carcinoma of breast
  • Malignant neoplasm of female breast
  • Malignant phyllodes tumor of breast
  • Primary invasive malignant neoplasm of female breast
  • Primary malignant inflammatory neoplasm of female breast
  • Recurrent primary malignant neoplasm of breast
  • Secondary malignant neoplasm of eye from female breast
  • Secondary malignant neoplasm of lymph node from neoplasm of breast
  • Secondary malignant neoplasm of lymph node from neoplasm of female breast
ICD-10-CM C50.919 is grouped within Diagnostic Related Group(s) (MS-DRG v43.0):
  • 582 Mastectomy for malignancy with cc/mcc
  • 583 Mastectomy for malignancy without cc/mcc
  • 597 Malignant breast disorders with mcc
  • 598 Malignant breast disorders with cc
  • 599 Malignant breast disorders without cc/mcc

Convert C50.919 to ICD-9-CM

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 C50.919 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 C50.A1 Malignant inflammatory neoplasm of right breast C50.A2 Malignant inflammatory neoplasm of left breast C51 Malignant neoplasm of vulva C51.0 Malignant neoplasm of labium majus

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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