C43
ICD-10Non-billable categoryMalignant melanoma of skin
Official ICD-10-CM descriptor (FY2026)
Malignant melanoma of skin
C43 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- melanoma in situ (D03.-)
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- malignant melanoma of skin of genital organs (C51-C52, C60.-, C63.-)
- Merkel cell carcinoma (C4A.-)
- sites other than skin-code to malignant neoplasm of the site
More specific codes under C43
- C43.0Malignant melanoma of lip
- C43.1Malignant melanoma of eyelid, including canthuscategory
- C43.2Malignant melanoma of ear and external auricular canalcategory
- C43.3Malignant melanoma of other and unspecified parts of facecategory
- C43.4Malignant melanoma of scalp and neck
- C43.5Malignant melanoma of trunkcategory
- C43.6Malignant melanoma of upper limb, including shouldercategory
- C43.7Malignant melanoma of lower limb, including hipcategory
- C43.8Malignant melanoma of overlapping sites of skin
- C43.9Malignant melanoma of skin, unspecified
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.