Valid for Submission
C4A.4 is a billable diagnosis code used to specify a medical diagnosis of merkel cell carcinoma of scalp and neck. The code C4A.4 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code C4A.4 might also be used to specify conditions or terms like malignant neoplasm of scalp, merkel cell carcinoma, merkel cell carcinoma, merkel cell carcinoma of neck, merkel cell carcinoma of scalp , primary malignant neoplasm of skin of neck, etc.
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code C4A.4 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Malignant neoplasm of scalp
- Merkel cell carcinoma
- Merkel cell carcinoma
- Merkel cell carcinoma of neck
- Merkel cell carcinoma of scalp
- Primary malignant neoplasm of skin of neck
- Primary malignant neoplasm of skin of scalp
- Primary malignant neoplasm of soft tissues of neck
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|595||MAJOR SKIN DISORDERS WITH MCC||09||2.0121|
|596||MAJOR SKIN DISORDERS WITHOUT MCC||09||0.9892|
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert C4A.4 to ICD-9 Code
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
[Learn More in MedlinePlus]