C50.521

Billable

Malignant neoplasm of lower-outer quadrant of right male 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 develops in the lower-outer area of the right breast in men.

Coding Tips

•Confirm male gender and right breast with lower-outer quadrant location
•Male breast cancer codes use different digit patterns than female codes; verify correct code selection

Clinical Significance

Male breast cancer of the lower-outer quadrant of the right breast is exceedingly rare, as male breast cancer itself accounts for less than 1% of all breast cancers. Due to the smaller amount of breast tissue in males, tumors are often closer to the nipple-areolar complex, making accurate quadrant documentation essential for surgical planning.

Documentation Requirements

✓Confirmed male patient sex
✓Laterality documented as right breast
✓Specific quadrant identified as lower-outer
✓Histological type (invasive ductal carcinoma predominates in males)
✓BRCA genetic testing status if applicable
✓TNM staging and receptor status
✓Family history of breast cancer if documented

Commonly Confused Codes

C50.511 — Lower-outer quadrant of right female breast; gender code error (4th digit 1=female, 2=male)C50.522 — Lower-outer quadrant of left male breast; laterality error C50.921 — Unspecified site of right male breast; less specific when quadrant is documented

Code Hierarchy

└C50Malignant neoplasm of breast └C50.5Malignant neoplasm of lower-outer quadrant of breast └C50.52Malignant neoplasm of lower-outer quadrant of breast, male └C50.521Malignant neoplasm of lower-outer quadrant of right male breast

└C50.521Malignant neoplasm of lower-outer quadrant of right male breast