C50.519
BillableMalignant neoplasm of lower-outer quadrant of unspecified 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 in the lower-outer area of the breast in women when the specific side (left or right) is not documented.
Coding Tips
- •Use only when laterality is genuinely unspecified in the medical record
- •Check operative reports, imaging studies, and pathology reports for laterality information
Clinical Significance
This unspecified laterality code for female breast cancer of the lower-outer quadrant indicates a documentation gap. In modern oncology practice, laterality should virtually always be determinable from imaging, pathology, or surgical records. This code should be used sparingly and prompts a provider query.
Documentation Requirements
- ✓Confirmed female patient sex
- ✓Quadrant confirmed as lower-outer
- ✓Clinical rationale for why laterality cannot be determined
- ✓Evidence that provider query was attempted for laterality clarification
- ✓Histological type and staging information
Commonly Confused Codes
Code Hierarchy
└C50Malignant neoplasm of breast└C50.5Malignant neoplasm of lower-outer quadrant of breast└C50.51Malignant neoplasm of lower-outer quadrant of breast, female└C50.519Malignant neoplasm of lower-outer quadrant of unspecified female breast
└C50.519Malignant neoplasm of lower-outer quadrant of unspecified female breast