C43 – Malignant melanoma of skin

ICD-10-CM 2027 diagnosis code · Melanoma and other malignant neoplasms of skin

Non-billable header

ICD-10-CM code C43

Code: C43 (claims format: C43)
Description: Malignant melanoma of skin
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: C43-C44 Melanoma and other malignant neoplasms of skin

Billable codes under C43

C43 is a header code and cannot be used on claims. Choose the most specific code:

C43.0 – Malignant melanoma of lipBillable
C43.1 – Malignant melanoma of eyelid, including canthusHeader (more codes below)
C43.2 – Malignant melanoma of ear and external auricular canalHeader (more codes below)
C43.3 – Malignant melanoma of other and unspecified parts of faceHeader (more codes below)
C43.4 – Malignant melanoma of scalp and neckBillable
C43.5 – Malignant melanoma of trunkHeader (more codes below)
C43.6 – Malignant melanoma of upper limb, including shoulderHeader (more codes below)
C43.7 – Malignant melanoma of lower limb, including hipHeader (more codes below)
C43.8 – Malignant melanoma of overlapping sites of skinBillable
C43.9 – Malignant melanoma of skin, unspecifiedBillable

Notes for C43

Excludes1 (not coded here):

melanoma in situ (D03.-)

Excludes2 (not included here):

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

Frequently asked questions

What is ICD-10 code C43?

C43 is the ICD-10-CM code for malignant melanoma of skin, in the block C43-C44 (Melanoma and other malignant neoplasms of skin).

Is C43 a billable code?

No. C43 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.