D03.122

Billable

Melanoma in situ of left 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

Abnormal melanoma cells on the left lower eyelid or corner of the left eye that have not yet invaded deeper tissue.

Coding Tips

•This code is specific to the left lower eyelid - verify documentation clearly indicates lower eyelid involvement
•Distinguish from D03.121 which codes the left upper eyelid

Clinical Significance

Melanoma in situ of the left lower eyelid represents early melanocytic malignancy confined to the epidermis of the left lower eyelid and its associated canthal region. Lower eyelid lesions are more sun-exposed and clinically visible, potentially allowing earlier detection than upper eyelid lesions. Treatment involves excision with margin control, with attention to preserving lower eyelid function and preventing ectropion.

Documentation Requirements

✓Biopsy must confirm melanoma in situ limited to the epidermis.
✓Documentation should specify left laterality and lower eyelid location.
✓Margin status from excision, any reconstructive procedures, and planned surveillance interval should be recorded in the medical record.

Commonly Confused Codes

D03.121 (left upper eyelid) differs in eyelid position D03.112 (right lower eyelid) differs in laterality C43.122 (invasive melanoma of left lower eyelid) applies when dermal invasion is present D04.1 (carcinoma in situ of skin of eyelid) represents a non-melanocytic in situ carcinoma.

Code Hierarchy

└D03Melanoma in situ └D03.1Melanoma in situ of eyelid, including canthus └D03.12Melanoma in situ of left eyelid, including canthus └D03.122Melanoma in situ of left lower eyelid, including canthus

└D03.122Melanoma in situ of left lower eyelid, including canthus