C50 Malignant neoplasm of breast

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Malignant neoplasm of breast is C50 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
C50: Malignant neoplasms of breast (C50)
Category C50
86 codes (57 billable)
FY2026 Status
Stable since FY2024
Includes
  • connective tissue of breast
  • Paget's disease of breast
  • Paget's disease of nipple
Excludes1
Not coded here. These conditions should NOT be coded together with C50.
  • skin of breast (C44.501, C44.511, C44.521, C44.591)
Use Additional Code
  • code to identify estrogen, and other hormones and factors receptor status (Z17.-)

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.a
Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference C50 with the canonical source and edition:

C50 — Malignant neoplasm of breast. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/C50

Canonical URL: https://icd10codingpro.com/codes/C50

Related Codes

More Specific Codes

C50.0 Malignant neoplasm of nipple and areola C50.1 Malignant neoplasm of central portion of breast C50.2 Malignant neoplasm of upper-inner quadrant of breast C50.3 Malignant neoplasm of lower-inner quadrant of breast C50.4 Malignant neoplasm of upper-outer quadrant of breast C50.5 Malignant neoplasm of lower-outer quadrant of breast C50.6 Malignant neoplasm of axillary tail of breast C50.8 Malignant neoplasm of overlapping sites of breast C50.9 Malignant neoplasm of breast of unspecified site C50.A Malignant inflammatory neoplasm of breast

All Codes in C50

Every most-specific code under C50 Malignant neoplasm of breast (57 codes):

Show the complete C50 code list
C50.011 Malignant neoplasm of nipple and areola, right female breast C50.012 Malignant neoplasm of nipple and areola, left female breast C50.019 Malignant neoplasm of nipple and areola, unspecified female breast C50.021 Malignant neoplasm of nipple and areola, right male breast C50.022 Malignant neoplasm of nipple and areola, left male breast C50.029 Malignant neoplasm of nipple and areola, unspecified male breast C50.111 Malignant neoplasm of central portion of right female breast C50.112 Malignant neoplasm of central portion of left female breast C50.119 Malignant neoplasm of central portion of unspecified female breast C50.121 Malignant neoplasm of central portion of right male breast C50.122 Malignant neoplasm of central portion of left male breast C50.129 Malignant neoplasm of central portion of unspecified male breast C50.211 Malignant neoplasm of upper-inner quadrant of right female breast C50.212 Malignant neoplasm of upper-inner quadrant of left female breast C50.219 Malignant neoplasm of upper-inner quadrant of unspecified female breast C50.221 Malignant neoplasm of upper-inner quadrant of right male breast C50.222 Malignant neoplasm of upper-inner quadrant of left male breast C50.229 Malignant neoplasm of upper-inner quadrant of unspecified male breast C50.311 Malignant neoplasm of lower-inner quadrant of right female breast C50.312 Malignant neoplasm of lower-inner quadrant of left female breast C50.319 Malignant neoplasm of lower-inner quadrant of unspecified female breast C50.321 Malignant neoplasm of lower-inner quadrant of right male breast C50.322 Malignant neoplasm of lower-inner quadrant of left male breast C50.329 Malignant neoplasm of lower-inner quadrant of unspecified male breast C50.411 Malignant neoplasm of upper-outer quadrant of right female breast C50.412 Malignant neoplasm of upper-outer quadrant of left female breast C50.419 Malignant neoplasm of upper-outer quadrant of unspecified female breast C50.421 Malignant neoplasm of upper-outer quadrant of right male breast C50.422 Malignant neoplasm of upper-outer quadrant of left male breast C50.429 Malignant neoplasm of upper-outer quadrant of unspecified male breast C50.511 Malignant neoplasm of lower-outer quadrant of right female breast C50.512 Malignant neoplasm of lower-outer quadrant of left female breast C50.519 Malignant neoplasm of lower-outer quadrant of unspecified female breast C50.521 Malignant neoplasm of lower-outer quadrant of right male breast C50.522 Malignant neoplasm of lower-outer quadrant of left male breast C50.529 Malignant neoplasm of lower-outer quadrant of unspecified male breast C50.611 Malignant neoplasm of axillary tail of right female breast C50.612 Malignant neoplasm of axillary tail of left female breast C50.619 Malignant neoplasm of axillary tail of unspecified female breast C50.621 Malignant neoplasm of axillary tail of right male breast C50.622 Malignant neoplasm of axillary tail of left male breast C50.629 Malignant neoplasm of axillary tail of unspecified male breast 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 C50.821 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 C50.911 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 C50.921 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.A0 Malignant inflammatory neoplasm of unspecified breast C50.A1 Malignant inflammatory neoplasm of right breast C50.A2 Malignant inflammatory neoplasm of left breast
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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