C43 Malignant melanoma of skin

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Malignant melanoma of skin is C43 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
C43-C44: Melanoma and other malignant neoplasms of skin (C43-C44)
Category C43
33 codes (24 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with C43.
  • melanoma in situ (D03.-)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • 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

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.a
Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

C43.0 Malignant melanoma of lip C43.1 Malignant melanoma of eyelid, including canthus C43.10 Malignant melanoma of unspecified eyelid, including canthus C43.11 Malignant melanoma of right eyelid, including canthus C43.111 Malignant melanoma of right upper eyelid, including canthus C43.112 Malignant melanoma of right lower eyelid, including canthus C43.12 Malignant melanoma of left eyelid, including canthus C43.121 Malignant melanoma of left upper eyelid, including canthus C43.122 Malignant melanoma of left lower eyelid, including canthus C43.2 Malignant melanoma of ear and external auricular canal C43.20 Malignant melanoma of unspecified ear and external auricular canal C43.21 Malignant melanoma of right ear and external auricular canal C43.22 Malignant melanoma of left ear and external auricular canal C43.3 Malignant melanoma of other and unspecified parts of face C43.30 Malignant melanoma of unspecified part of face C43.31 Malignant melanoma of nose C43.39 Malignant melanoma of other parts of face C43.4 Malignant melanoma of scalp and neck C43.5 Malignant melanoma of trunk C43.51 Malignant melanoma of anal skin C43.52 Malignant melanoma of skin of breast C43.59 Malignant melanoma of other part of trunk C43.6 Malignant melanoma of upper limb, including shoulder C43.60 Malignant melanoma of unspecified upper limb, including shoulder C43.61 Malignant melanoma of right upper limb, including shoulder C43.62 Malignant melanoma of left upper limb, including shoulder C43.7 Malignant melanoma of lower limb, including hip C43.70 Malignant melanoma of unspecified lower limb, including hip C43.71 Malignant melanoma of right lower limb, including hip C43.72 Malignant melanoma of left lower limb, including hip

Related Codes in C43

C43.0 Malignant melanoma of lip C43.1 Malignant melanoma of eyelid, including canthus C43.10 Malignant melanoma of unspecified eyelid, including canthus C43.11 Malignant melanoma of right eyelid, including canthus C43.111 Malignant melanoma of right upper eyelid, including canthus C43.112 Malignant melanoma of right lower eyelid, including canthus C43.12 Malignant melanoma of left eyelid, including canthus C43.121 Malignant melanoma of left upper eyelid, including canthus C43.122 Malignant melanoma of left lower eyelid, including canthus C43.2 Malignant melanoma of ear and external auricular canal C43.20 Malignant melanoma of unspecified ear and external auricular canal C43.21 Malignant melanoma of right ear and external auricular canal C43.22 Malignant melanoma of left ear and external auricular canal C43.3 Malignant melanoma of other and unspecified parts of face C43.30 Malignant melanoma of unspecified part of face C43.31 Malignant melanoma of nose C43.39 Malignant melanoma of other parts of face C43.4 Malignant melanoma of scalp and neck C43.5 Malignant melanoma of trunk C43.51 Malignant melanoma of anal skin
Search all 70,000+ ICD-10-CM codes →
Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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