C50.619

Billable

Malignant neoplasm of axillary tail of unspecified 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 in the axillary tail of a female breast when the specific side (left or right) is not documented or unknown.

Coding Tips

•Use this code only when laterality cannot be determined from documentation; if known, use C50.611 or C50.612
•Query the provider if laterality is not specified, as it affects staging and treatment planning

Clinical Significance

This unspecified laterality code for axillary tail breast cancer in females should prompt a provider query. The axillary tail is a clinically important anatomical landmark, and laterality is almost always determinable from physical examination, imaging, or surgical documentation. Unspecified codes in this context suggest incomplete record review.

Documentation Requirements

✓Confirmed female patient sex
✓Site confirmed as axillary tail
✓Clinical justification for unspecified laterality
✓Evidence of query attempt for laterality clarification
✓Available imaging or pathology reports reviewed

Commonly Confused Codes

C50.611 — Axillary tail of right female breast; use when right is confirmed C50.612 — Axillary tail of left female breast; use when left is confirmed C50.919 — Unspecified site of unspecified female breast; even more nonspecific

Code Hierarchy

└C50Malignant neoplasm of breast └C50.6Malignant neoplasm of axillary tail of breast └C50.61Malignant neoplasm of axillary tail of breast, female └C50.619Malignant neoplasm of axillary tail of unspecified female breast

└C50.619Malignant neoplasm of axillary tail of unspecified female breast