ICD-10 Diagnosis Code D04.20

Ca in situ skin of unsp ear and external auricular canal

Diagnosis Code D04.20

ICD-10: D04.20
Short Description: Ca in situ skin of unsp ear and external auricular canal
Long Description: Carcinoma in situ of skin of unspecified ear and external auricular canal
This is the 2017 version of the ICD-10-CM diagnosis code D04.20

Code Classification
  • Neoplasms
    • In situ neoplasms (D00-D09)
      • Carcinoma in situ of skin (D04)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code D04.20 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


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.

  • Carcinoma in situ of ear
  • Carcinoma in situ of ear, nose and throat
  • Carcinoma in situ of skin of auricle
  • Carcinoma in situ of skin of ear
  • Carcinoma in situ of skin of external auditory canal
  • Neoplasm of skin of external auditory canal

Information for Patients

Skin Cancer

Skin cancer is the most common form of cancer in the United States. The two most common types are basal cell cancer and squamous cell cancer. They usually form on the head, face, neck, hands, and arms. Another type of skin cancer, melanoma, is more dangerous but less common.

Anyone can get skin cancer, but it is more common in people who

  • Spend a lot of time in the sun or have been sunburned
  • Have light-colored skin, hair and eyes
  • Have a family member with skin cancer
  • Are over age 50

You should have your doctor check any suspicious skin markings and any changes in the way your skin looks. Treatment is more likely to work well when cancer is found early. If not treated, some types of skin cancer cells can spread to other tissues and organs. Treatments include surgery, radiation therapy, chemotherapy, photodynamic therapy (PDT), and biologic therapy. PDT uses a drug and a type of laser light to kill cancer cells. Biologic therapy boosts your body's own ability to fight cancer.

NIH: National Cancer Institute

  • Actinic keratosis
  • Basal cell carcinoma
  • Mohs micrographic surgery
  • Skin lesion biopsy
  • Skin self-exam
  • Squamous cell skin cancer
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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