C43.10
BillableMalignant melanoma of unspecified eyelid, including canthus
HCC Category Mapping
V28HCC 23 — Melanoma and Other Skin Cancers
0.251V24HCC 12 — Breast, Prostate, and Other Cancers and Tumors
0.150ESRDHCC 12 — Breast, Prostate, and Other Cancers and Tumors
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Melanoma (a serious type of skin cancer) of the eyelid when the specific eye is not identified.
Coding Tips
- •Eyelid melanoma is relatively rare; ensure documentation clearly indicates eyelid location
- •Query for laterality (right or left eye) to assign a more specific code if available
Clinical Significance
Malignant melanoma of the eyelid, including the canthus, with unspecified laterality. Eyelid melanomas are rare but important because of their proximity to the eye and potential for orbital and intracranial spread. Mohs micrographic surgery or wide excision with margin control is typically required. The unspecified laterality should prompt a provider query.
Documentation Requirements
- ✓Attempt to clarify laterality (right vs. left) and specific eyelid (upper vs. lower)
- ✓Breslow depth and Clark level
- ✓Whether the canthus (inner or outer corner) is involved
- ✓Ulceration status and mitotic rate
- ✓Sentinel lymph node biopsy results (parotid and cervical nodes)
- ✓AJCC staging
Commonly Confused Codes
C43.111/C43.112 — Melanoma of right upper/lower eyelid; use when right side is documentedC43.121/C43.122 — Melanoma of left upper/lower eyelid; use when left side is documentedC44.10x — Other skin cancer of eyelid (basal cell or squamous cell carcinoma); different histologyD03.10 — Melanoma in situ of unspecified eyelid; non-invasive, does not map to HCC
Code Hierarchy
└C43Malignant melanoma of skin└C43.1Malignant melanoma of eyelid, including canthus└C43.10Malignant melanoma of unspecified eyelid, including canthus
└C43.10Malignant melanoma of unspecified eyelid, including canthus