2022 ICD-10-CM Diagnosis Code C50.912: 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 C50.912
2026 ICD-10-CM Diagnosis Code C50.912

Malignant neoplasm of unspecified site of left female breast

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code Female Dx
  • C50.912 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2026 edition of ICD-10-CM C50.912 became effective on October 1, 2025.
  • This is the American ICD-10-CM version of C50.912 - other international versions of ICD-10 C50.912 may differ.
ICD-10-CM Coding Rules
  • C50.912 is applicable to female patients.
The following code(s) above C50.912 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 C50.912:
  • 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
  • Angiosarcoma of bilateral female breasts
  • Angiosarcoma of left female breast
  • Bilateral female breast sarcoma
  • Cancer, female breast, left breast
  • Female breast angiosarcoma, bilateral breasts
  • Female breast angiosarcoma, left breast
  • Female breast cancer, bilateral breasts
  • Female breast infiltrating ductal carcinoma, bilateral breasts
  • Female breast infiltrating ductal carcinoma, l breast
  • Female breast infiltrating lobular carcinoma, bilateral breasts
  • Female breast infiltrating lobular carcinoma, l breast
  • Infiltrating duct carcinoma of left female breast
  • Infiltrating ductal carcinoma of bilateral female breasts
  • Infiltrating ductal carcinoma of left female breast
  • Infiltrating lobular carcinoma of bilateral female breasts
  • Infiltrating lobular carcinoma of left female breast
  • Left female breast sarcoma
  • Malignant phyllodes tumor of bilateral female breasts
  • Malignant phyllodes tumor of left female breast
  • Phyllodes tumor, malignant, female bilat breasts
  • Phyllodes tumor, malignant, female left breast
  • Primary malignant neoplasm of bilateral female breasts
  • Primary malignant neoplasm of female left breast
  • Recurrent female breast cancer, bilateral breasts
  • Recurrent female breast cancer, l breast
  • Recurrent primary malignant neoplasm of bilateral female breasts
  • Recurrent primary malignant neoplasm of left female breast
  • Sarcoma of bilateral female breasts
  • Sarcoma of left female breast
ICD-10-CM C50.912 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 C50.912 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 C50.912 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 C50.A1 Malignant inflammatory neoplasm of right breast C50.A2 Malignant inflammatory neoplasm of left breast C51 Malignant neoplasm of vulva

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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