C50.622

Billable

Malignant neoplasm of axillary tail of left 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 left male breast.

Coding Tips

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

Clinical Significance

Cancer of the axillary tail of the left male breast is among the rarest breast cancer presentations. Male breast cancer overall has a higher mortality rate than female breast cancer, partly due to delayed diagnosis. The axillary tail location adds complexity due to potential lymph node involvement and the need for careful surgical planning.

Documentation Requirements

✓Confirmed male patient sex
✓Laterality documented as left breast
✓Specific site identified as axillary tail
✓Histological confirmation of malignancy
✓TNM staging and lymph node assessment
✓Receptor status documentation
✓Family history and genetic testing results if available

Commonly Confused Codes

C50.612 — Axillary tail of left female breast; wrong gender code C50.621 — Axillary tail of right male breast; laterality confusion C50.629 — Axillary tail of unspecified male breast; use only when laterality is truly unknown

Code Hierarchy

└C50Malignant neoplasm of breast └C50.6Malignant neoplasm of axillary tail of breast └C50.62Malignant neoplasm of axillary tail of breast, male └C50.622Malignant neoplasm of axillary tail of left male breast

└C50.622Malignant neoplasm of axillary tail of left male breast