D03.112

HCC Category Mapping

What This Code Means

This is an early-stage skin cancer (melanoma) found on the right lower eyelid or the corner of the eye that has not yet spread to deeper layers of skin or other parts of the body. It is considered 'in situ,' meaning the cancer cells are confined to the outermost layer of skin.

Coding Tips

• •The sixth character '2' specifies the right side; use '1' for left side and '3' for bilateral when applicable
• •Verify documentation clearly identifies the specific eyelid location (lower, upper, or canthus) and laterality before assigning this code

Clinical Significance

Melanoma in situ of the right lower eyelid is an early melanocytic malignancy limited to the epidermal layer of the right lower eyelid and adjacent canthal area. Lower eyelid melanoma in situ may present as a slowly expanding pigmented lesion that can mimic benign conditions such as pigmented basal cell carcinoma or conjunctival melanosis. Complete excision with margin control is essential to prevent progression to invasive melanoma.

Documentation Requirements

• ✓Biopsy-confirmed melanoma in situ with pathology documenting epidermal confinement.
• ✓Right laterality and lower eyelid specificity must be clearly stated in the operative and pathology reports.
• ✓Post-excision margin assessment and follow-up surveillance schedule should be documented.

Commonly Confused Codes