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

C50.42 is the ICD-10-CM 2025 code for Malignant neoplasm of upper-outer quadrant of breast, male. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.

C50.42 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under C50.42. Browse the sub-codes listed on this page.

C50.42 belongs to the chapter "Neoplasms" (codes C00-D49). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.

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