C4A.51
BillableMerkel cell carcinoma of anal skin
Merkel cell carcinoma of anal skin
Cross-references
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Merkel cell carcinoma of anal margin
- Merkel cell carcinoma of perianal skin
Excludes 2
Conditions not included here, but the patient may have both
Related Codes(2)
How C4A.51 differs from sibling codes
All children of C4A.5 share the same parent. The wording below is what mechanically separates each sibling from C4A.51.
Also Known As / Clinical Terms(6)
UMLS
Clinical Terms
- Merkel cell carcinoma of anal margin
- Merkel cell carcinoma of perianal skin
Common questions
What is the ICD-10-CM code for Merkel cell carcinoma of anal skin?
Merkel cell carcinoma of anal skin is coded as C4A.51 in ICD-10-CM.
What is ICD-10 code C4A.51?
C4A.51 is the ICD-10-CM identifier for Merkel cell carcinoma of anal skin. It is included in the official 2025 release of ICD-10-CM published by CMS and NCHS.
Is C4A.51 a billable code?
Yes, C4A.51 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.51?
C4A.51 sits under C4A.5 (Merkel cell carcinoma of trunk) in the ICD-10-CM hierarchy.
What chapter does C4A.51 belong to?
C4A.51 is in Chapter 2: Neoplasms.
What are the synonyms for Merkel cell carcinoma of anal skin?
In clinical text, merkel cell carcinoma of anal skin is also written as: Merkel cell carcinoma of anal margin, Merkel cell carcinoma of perianal skin. Sourced from UMLS Metathesaurus and clinical-terms enrichment.
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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.