C4A.9 - Merkel cell carcinoma, unspecified
- Applicable to Merkel cell carcinoma, unspecified
- The 2025 edition of ICD10-CM C4A.9 became effective on October 1, 2024.
- This is the American ICD10-CM version of C4A.9 - other international versions of ICD10 C4A.9 may differ.
- C4A.9 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Inclusion Term
- Merkel cell carcinoma of unspecified site
- Merkel cell carcinoma NOS
The following codes above C4A.9 contain annotation back-references that may be applicable to C4A.9:
Chapter: C00-D49 Neoplasms
Section: C43-C44 Melanoma and other malignant neoplasms of skin
Category: C4A Merkel cell carcinoma
Billable/Specific Code
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Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
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