C4A.2
Non-billableMerkel cell carcinoma of ear and external auricular canal
C4A.2 is the ICD-10-CM code for Merkel cell carcinoma of ear and external auricular canal. It is a non-billable category code — use a more specific child code such as C4A.20 for billing.
C00-D49 Neoplasms
No additional coding notes for this code.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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