ICD-10 Diagnosis Code C4A.11

Merkel cell carcinoma of right eyelid, including canthus

Diagnosis Code C4A.11

ICD-10: C4A.11
Short Description: Merkel cell carcinoma of right eyelid, including canthus
Long Description: Merkel cell carcinoma of right eyelid, including canthus
This is the 2019 version of the ICD-10-CM diagnosis code C4A.11

Not Valid for Submission
The code C4A.11 is a "header" and not valid for submission for HIPAA-covered transactions.

Deleted Code Additional informationCallout TooltipDeleted Code
The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2018. This code was replaced for the FY 2019 (October 1, 2018-September 30, 2019).

This code was deleted in the 2019 ICD-10 code set with the code(s) listed below.
  • C4A.111 - Merkel cell carcinoma of right upper eyelid, inc canthus
  • C4A.112 - Merkel cell carcinoma of right lower eyelid, inc canthus

Code Classification
  • Neoplasms (C00–D48)
    • Melanoma and other malignant neoplasms of skin (C43-C44)
      • Merkel cell carcinoma (C4A)

Information for Medical Professionals

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

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


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