Diagnosis Code C4A.21
Information for Medical Professionals
The diagnosis code C4A.21 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)
Convert to ICD-9 General 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.
- 209.31 - Merkel cell ca-face (approximate) Approximate Flag
The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
Information for Patients
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)