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C43 ICD-10-CM Code: Malignant melanoma of skin

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Official description

C43

Malignant melanoma of skin

ICD-10-CM diagnosis code · United States clinical modification

Where C43 sits

  1. 1

    Chapter 2

    Neoplasms (C00-D49)

  2. 2

    Section

    Melanoma and other malignant neoplasms of skin (C43-C44)

  3. 3

    Category C43

    Malignant melanoma of skin

  4. 4

    Code C43

    Malignant melanoma of skin

Codes under C43

C43 is a non-billable category. Choose the child code that best matches the documented diagnosis.

C43.0Malignant melanoma of lipC43.1Malignant melanoma of eyelid, including canthusC43.2Malignant melanoma of ear and external auricular canalC43.3Malignant melanoma of other and unspecified parts of faceC43.4Malignant melanoma of scalp and neckC43.5Malignant melanoma of trunkC43.6Malignant melanoma of upper limb, including shoulderC43.7Malignant melanoma of lower limb, including hipC43.8Malignant melanoma of overlapping sites of skinC43.9Malignant melanoma of skin, unspecified

Notes for this code

Inclusion terms

No inclusion terms are listed for C43.

Code first

No “code first” instruction is listed for C43.

Use additional code

No “use additional code” instruction is listed for C43.

Excludes1

Conditions that should not be reported together with this code.

  • melanoma in situ (D03.-)

Excludes2

Conditions not included here that may be reported separately when present.

  • 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

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Frequently asked questions

What does ICD-10-CM code C43 mean?

C43 is the FY 2027 U.S. ICD-10-CM code for “Malignant melanoma of skin.”

Is C43 a billable or specific ICD-10-CM code?

No. C43 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is C43 located in ICD-10-CM?

C43 is listed in Chapter 2, Neoplasms (C00-D49), within Melanoma and other malignant neoplasms of skin (C43-C44) (C43–C44), under category C43, Malignant melanoma of skin.

What coding notes are listed for C43?

No inclusion terms are listed for C43 in this reference record. No code-first instruction is listed. Excludes1 notes: melanoma in situ (D03.-). Excludes2 notes: 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.