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  2. ICD-10-CM Codes List
  3. C00–D49
  4. C43-C44
  5. Malignant melanoma of skin (C43)

Malignant melanoma of skin (C43)

ICD-10 code C43 covers malignant melanoma of the skin, including specific codes for melanoma affecting various skin sites such as the lip, eyelids, ear, face, scalp, trunk, limbs, and overlapping or unspecified locations. These codes identify and classify different forms and locations of this aggressive skin cancer.

Malignant melanoma of skin is uniquely coded under C43 and its subcategories, which specify the exact site like C43.0 for melanoma of the lip, including synonyms like malignant melanoma of oral cavity, helping coders link common terms to the official code. Eyelid melanomas have detailed codes like C43.11 and C43.12 differentiating right and left eyelids. Codes such as C43.20 cover melanoma of the ear and external auditory canal, while C43.31 refers specifically to melanoma of the nose. The classification also extends to melanomas on the trunk (C43.5), upper limbs (C43.6), and lower limbs (C43.7), each with more precise subcodes for side and part affected.

For those seeking the ICD-10 code for skin melanoma in less assigned or overlapping areas, C43.8 and C43.9 represent overlapping sites and unspecified skin locations respectively. The inclusion of various synonyms in these listings, such as "melanoma carcinomatosis" or "primary lentigo maligna melanoma," assists both medical coders and healthcare professionals in accurately matching clinical diagnoses or documentation to the correct ICD-10-CM codes for malignant melanoma of the skin.

  • Neoplasms (C00–D49)

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

        • Malignant melanoma of skin (C43)

        • C43 Malignant melanoma of skin
        • 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
        • C43.8 Malignant melanoma of overlapping sites of skin
        • C43.9 Malignant melanoma of skin, unspecified

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • melanoma in situ D03

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • 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