C4A.121 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Short description: Merkel cell carcinoma of left upper eyelid, inc canthus
The 2023 edition of ICD-10-CM C4A.121 became effective on October 1, 2022.
This is the American ICD-10-CM version of C4A.121 – other international versions of ICD-10 C4A.121 may differ.