C50.812

Billable

Malignant neoplasm of overlapping sites of left female breast

HCC Category Mapping

V28HCC 23 — Melanoma and Other Skin Cancers

0.251

V24HCC 12 — Breast, Prostate, and Other Cancers and Tumors

0.150

ESRDHCC 12 — Breast, Prostate, and Other Cancers and Tumors

0.000

RxHCCHCC 22 — Cancer, Other Specified Sites

0.000

What This Code Means

Cancer that involves multiple overlapping areas of the left female breast rather than being confined to a single quadrant or region.

Coding Tips

•Use this code when the tumor spans two or more distinct anatomical regions of the breast
•Overlapping site designation may indicate more advanced local disease; ensure documentation supports this classification

Clinical Significance

Overlapping sites of the left female breast represents a malignancy spanning multiple breast regions, typically indicating locally advanced disease. This code is clinically distinct from unspecified site codes — it conveys that the tumor actively involves more than one anatomical subsite rather than that the location is simply unknown.

Documentation Requirements

✓Confirmed female patient sex
✓Laterality documented as left breast
✓Documentation of involvement across two or more breast subsites
✓Identification of which specific subsites are involved
✓Tumor dimensions and local extent
✓TNM staging and lymph node assessment
✓Histological type, grade, and receptor status

Commonly Confused Codes

C50.811 — Overlapping sites of right female breast; laterality reversal C50.912 — Unspecified site of left female breast; use when location is unknown, not when multiple sites are involved C50.819 — Overlapping sites of unspecified female breast; use only when laterality is unknown

Code Hierarchy

└C50Malignant neoplasm of breast └C50.8Malignant neoplasm of overlapping sites of breast └C50.81Malignant neoplasm of overlapping sites of breast, female └C50.812Malignant neoplasm of overlapping sites of left female breast

└C50.812Malignant neoplasm of overlapping sites of left female breast