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C50.4

⚠ Non-billable (Header)

Malignant neoplasm of upper-outer quadrant of breast

Neoplasms (C00-D49)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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❌ Excludes1

inherited from C50

Rules from parent category C50: Malignant neoplasm of breast

  • • skin of breast (C44.501, C44.511, C44.521, C44.591)

📋 Code Instructions

from C50
  • • code to identify estrogen, and other hormones and factors receptor status (Z17.-)

Child Codes (2)

C50.41Malignant neoplasm of upper-outer quadrant of breast, femaleC50.42Malignant neoplasm of upper-outer quadrant of breast, male

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Code Information

CodeC50.4
BillableNo — Header code
ParentC50
CategoryNeoplasms (C00-D49)
Excludes11 rule(s)
Excludes20 note(s)
Child codes2

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)