C43.112

Billable

Malignant melanoma of right lower eyelid, including canthus

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

A type of skin cancer (melanoma) that starts in the right lower eyelid, including the corner of the eye where the eyelids meet.

Coding Tips

•Verify laterality (right vs left) is clearly documented in the medical record before assigning this code
•Ensure the melanoma location is specifically identified as lower eyelid to distinguish from upper eyelid codes (C43.111)

Clinical Significance

Malignant melanoma of the right lower eyelid, including the canthus. Lower eyelid melanomas have unique reconstructive challenges because of the critical role the lower eyelid plays in eye protection and tear drainage. Surgical excision must balance oncologic adequacy with functional preservation of the eyelid.

Documentation Requirements

✓Right side and lower eyelid explicitly documented
✓Breslow depth and Clark level
✓Ulceration status and mitotic rate
✓Involvement of the lacrimal drainage system or lower lid margin
✓Sentinel lymph node biopsy status
✓AJCC staging

Commonly Confused Codes

C43.111 — Melanoma of right UPPER eyelid; upper vs. lower distinction C43.122 — Melanoma of LEFT lower eyelid; laterality differentiation C43.10 — Melanoma of UNSPECIFIED eyelid; avoid when right lower is documented C44.112 — Other skin cancer of right lower eyelid; for non-melanoma skin cancers

Code Hierarchy

└C43Malignant melanoma of skin └C43.1Malignant melanoma of eyelid, including canthus └C43.11Malignant melanoma of right eyelid, including canthus └C43.112Malignant melanoma of right lower eyelid, including canthus

└C43.112Malignant melanoma of right lower eyelid, including canthus