C50.429
BillableMalignant neoplasm of upper-outer quadrant of unspecified male breast
HCC Category Mapping
V28HCC 23 — Melanoma and Other Skin Cancers
0.251V24HCC 12 — Breast, Prostate, and Other Cancers and Tumors
0.150ESRDHCC 12 — Breast, Prostate, and Other Cancers and Tumors
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Cancer in the upper-outer area of the breast in men when the specific side is not documented or cannot be determined.
Coding Tips
- •This unspecified code should be used only when laterality is truly unknown
- •Attempt to clarify laterality through provider query or review of imaging reports
Clinical Significance
This unspecified laterality code for male breast cancer of the upper-outer quadrant should be a red flag for incomplete documentation. Male breast cancer requires precise anatomical coding for treatment planning and cancer registry reporting. Using an unspecified code misses the opportunity for accurate risk stratification.
Documentation Requirements
- ✓Confirmed male patient sex
- ✓Clinical explanation for why laterality cannot be determined
- ✓Quadrant confirmed as upper-outer
- ✓Histological type and grade
- ✓Staging information
- ✓Evidence of provider query attempt for laterality clarification
Commonly Confused Codes
Code Hierarchy
└C50Malignant neoplasm of breast└C50.4Malignant neoplasm of upper-outer quadrant of breast└C50.42Malignant neoplasm of upper-outer quadrant of breast, male└C50.429Malignant neoplasm of upper-outer quadrant of unspecified male breast
└C50.429Malignant neoplasm of upper-outer quadrant of unspecified male breast