C4A.10
BillableMerkel cell carcinoma of unsp eyelid, including canthus
Merkel cell carcinoma of unspecified eyelid, including canthus
Cross-references
SNOMED CT
UMLS
Related Codes(2)
How C4A.10 differs from sibling codes
All children of C4A.1 share the same parent. The wording below is what mechanically separates each sibling from C4A.10.
Also Known As / Clinical Terms(7)
SNOMED CT
UMLS
Clinical Terms
- Primary Merkel cell carcinoma of skin of lower eyelid
- Primary Merkel cell carcinoma of skin of upper eyelid
Common questions
What is the ICD-10-CM code for Merkel cell carcinoma of unsp eyelid, including canthus?
Merkel cell carcinoma of unsp eyelid, including canthus is coded as C4A.10 in ICD-10-CM.
What is ICD-10 code C4A.10?
C4A.10 is the ICD-10-CM identifier for Merkel cell carcinoma of unsp eyelid, including canthus. It is included in the official 2025 release of ICD-10-CM published by CMS and NCHS.
Is C4A.10 a billable code?
Yes, C4A.10 is a billable / specific ICD-10-CM code that can be used to indicate a diagnosis on a medical claim.
What is the parent code of C4A.10?
C4A.10 sits under C4A.1 (Merkel cell carcinoma of eyelid, including canthus) in the ICD-10-CM hierarchy.
What chapter does C4A.10 belong to?
C4A.10 is in Chapter 2: Neoplasms.
What are the synonyms for Merkel cell carcinoma of unsp eyelid, including canthus?
In clinical text, merkel cell carcinoma of unsp eyelid, including canthus is also written as: Primary Merkel cell carcinoma of skin of lower eyelid, Primary Merkel cell carcinoma of skin of upper eyelid, Merkel Cell Carcinoma of Unspecified Eyelid, Including Canthus, Merkel cell carcinoma of unspecified eyelid, including canthus. Sourced from SNOMED CT, UMLS Metathesaurus, and clinical-terms enrichment.
Why does C4A.10 map to multiple SNOMED CT concepts?
ICD-10-CM is a billing classification with broader categories than SNOMED CT’s clinical terminology. C4A.10 captures the billing-level concept; SNOMED CT splits it into 2 clinical concepts: 1332235007, 1335996009.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.