C76.50

Billable

Malignant neoplasm of unspecified lower limb

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 has developed in a leg or foot, but the specific side (left or right) is not documented.

Coding Tips

•Use this code only when laterality cannot be determined; otherwise use C76.51 or C76.52
•This code represents malignant neoplasm of the lower limb including hip, thigh, knee, leg, ankle, and foot

Clinical Significance

Malignant neoplasm of an unspecified lower limb represents cancer in the lower extremity (thigh, leg, foot) where both the specific tissue of origin and laterality are ill-defined. This code carries double unspecificity and should prompt thorough chart review, pathology review, and provider query for both tissue type and laterality.

Documentation Requirements

✓Documentation confirming lower limb malignancy
✓Laterality — query for right (C76.51) or left (C76.52) specification
✓Pathology identifying tissue type to assign more specific codes
✓Imaging documenting tumor location within the lower extremity
✓Treatment plan and functional assessment

Commonly Confused Codes

C76.51/C76.52 — Right/left lower limb: Use lateralized codes when side is documented C40.20-C40.22 — Malignant neoplasm of long bones of lower limb: Bone tumors have specific codes C49.20-C49.22 — Connective tissue of lower limb: Soft tissue sarcomas have specific codes C43.70-C43.72 — Melanoma of lower limb: Skin melanoma has specific codes C44.70-C44.79 — Other skin cancer of lower limb: Non-melanoma skin cancer has specific codes