ICD-10 Diagnosis Code C43.20

Malignant melanoma of unsp ear and external auricular canal

Diagnosis Code C43.20

ICD-10: C43.20
Short Description: Malignant melanoma of unsp ear and external auricular canal
Long Description: Malignant melanoma of unspecified ear and external auricular canal
This is the 2018 version of the ICD-10-CM diagnosis code C43.20

Valid for Submission
The code C43.20 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • Melanoma and other malignant neoplasms of skin (C43-C44)
      • Malignant melanoma of skin (C43)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code C43.20 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Malignant melanoma of auricle
  • Malignant melanoma of ear and/or external auditory canal
  • Malignant melanoma of external auditory meatus
  • Malignant melanoma of skin of ear
  • Malignant melanoma of skin of external auditory canal
  • Malignant neoplasm of skin of external auditory meatus
  • Neoplasm of skin of external auditory canal

Information for Patients


Melanoma is the most serious type of skin cancer. Often the first sign of melanoma is a change in the size, shape, color, or feel of a mole. Most melanomas have a black or black-blue area. Melanoma may also appear as a new mole. It may be black, abnormal, or "ugly looking."

Thinking of "ABCDE" can help you remember what to watch for:

  • Asymmetry - the shape of one half does not match the other
  • Border - the edges are ragged, blurred or irregular
  • Color - the color is uneven and may include shades of black, brown and tan
  • Diameter - there is a change in size, usually an increase
  • Evolving - the mole has changed over the past few weeks or months

Surgery is the first treatment of all stages of melanoma. Other treatments include chemotherapy and radiation, biologic, and targeted therapies. Biologic therapy boosts your body's own ability to fight cancer. Targeted therapy uses substances that attack cancer cells without harming normal cells.

NIH: National Cancer Institute

  • After chemotherapy - discharge (Medical Encyclopedia)
  • Melanoma (Medical Encyclopedia)
  • Melanoma of the eye (Medical Encyclopedia)
  • Understanding Chemotherapy - NIH - Easy-to-Read (National Cancer Institute)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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