C50.621

Billable

Malignant neoplasm of axillary tail 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 axillary tail (the extension of breast tissue toward the armpit) of the right male breast.

Coding Tips

•Male breast cancer is rare; ensure documentation clearly indicates male patient and right-sided location
•The axillary tail location may have implications for lymph node involvement assessment

Clinical Significance

Cancer of the axillary tail of the right male breast is extremely rare, combining the rarity of male breast cancer with a less common anatomical location. The axillary tail location in males warrants careful assessment for lymph node involvement given the proximity to axillary lymphatic drainage and the typically later-stage presentation in male patients.

Documentation Requirements

✓Confirmed male patient sex
✓Laterality documented as right breast
✓Specific site identified as axillary tail
✓Histological type and grade
✓Lymph node status
✓TNM staging
✓BRCA or other genetic testing results if performed

Commonly Confused Codes

C50.611 — Axillary tail of right female breast; gender code confusion (4th digit 1=female, 2=male)C50.622 — Axillary tail of left male breast; laterality error C50.421 — Upper-outer quadrant of right male breast; different anatomical site within same breast region

Code Hierarchy

└C50Malignant neoplasm of breast └C50.6Malignant neoplasm of axillary tail of breast └C50.62Malignant neoplasm of axillary tail of breast, male └C50.621Malignant neoplasm of axillary tail of right male breast

└C50.621Malignant neoplasm of axillary tail of right male breast