C43.12Header code — not billable
Malignant melanoma of left eyelid, including canthus
- Chapter
- 2. Neoplasms
- Category
- C43
- Effective date
- October 1, 2026
Related codes in category C43
C43Malignant melanoma of skinC43.0Malignant melanoma of lipYesC43.1Malignant melanoma of eyelid, including canthusC43.10Malignant melanoma of unspecified eyelid, including canthusYesC43.11Malignant melanoma of right eyelid, including canthusC43.111Malignant melanoma of right upper eyelid, including canthusYesC43.112Malignant melanoma of right lower eyelid, including canthusYesC43.121Malignant melanoma of left upper eyelid, including canthusYesC43.122Malignant melanoma of left lower eyelid, including canthusYesC43.2Malignant melanoma of ear and external auricular canalC43.20Malignant melanoma of unsp ear and external auricular canalYesC43.21Malignant melanoma of right ear and external auricular canalYes
Frequently asked questions
What is ICD-10 code C43.12?
C43.12 is an ICD-10-CM diagnosis code for Malignant melanoma of left eyelid, including canthus.
Is C43.12 a billable code?
No. C43.12 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is C43.12 in?
C43.12 falls under Chapter 2: Neoplasms.
When did C43.12 become effective?
C43.12 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C43.12?
C43.12 belongs to category C43, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.