C50.512
BillableMalignant neoplasm of lower-outer quadrant of left female 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 that develops in the lower-outer area of the left breast in women.
Coding Tips
- •Ensure documentation specifies both the left side and lower-outer quadrant location
- •Review pathology and imaging reports to confirm the exact quadrant of the malignancy
Clinical Significance
Breast cancer of the lower-outer quadrant of the left female breast requires accurate laterality and quadrant documentation. The lower-outer quadrant contains substantial breast tissue and lymphatic drainage pathways, making precise localization important for sentinel lymph node mapping and radiation field planning.
Documentation Requirements
- ✓Confirmed female patient sex
- ✓Laterality documented as left breast
- ✓Specific quadrant identified as lower-outer
- ✓Histological type and grade
- ✓Tumor size and staging (TNM)
- ✓Receptor status (estrogen receptor, progesterone receptor, HER2)
- ✓Lymph node status and any metastatic involvement
Commonly Confused Codes
C50.511 — Lower-outer quadrant of right female breast; laterality reversal errorC50.522 — Lower-outer quadrant of left male breast; gender code confusionC50.412 — Upper-outer quadrant of left female breast; quadrant misidentificationC50.912 — Unspecified site of left female breast; use only when quadrant is unknown