ICD-10-CM Diagnosis Code (2025)
Official Description for C4A.9
Merkel cell carcinoma, unspecified
Coding Notes & Guidelines for C4A.9
Inclusion Terms
- Merkel cell carcinoma of unspecified site
- Merkel cell carcinoma NOS
Parent Code (Less Specific):
About ICD-10-CM Code C4A.9 (Merkel cell carcinoma)
ICD-10-CM code C4A.9 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C4A.9 became effective on October 1, 2024.
This page provides detailed information about C4A.9 - Merkel cell carcinoma, unspecified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Merkel cell carcinoma related to unspecified.