C4A.9
ICD-10BillableMerkel cell carcinoma, unspecified
Official ICD-10-CM descriptor (FY2026)
Merkel cell carcinoma, unspecified
C4A.9 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Merkel cell carcinoma of unspecified site
- Merkel cell carcinoma NOS
Related codes in C4A
- C4A.0Merkel cell carcinoma of lip
- C4A.1Merkel cell carcinoma of eyelid, including canthuscategory
- C4A.2Merkel cell carcinoma of ear and external auricular canalcategory
- C4A.3Merkel cell carcinoma of other and unspecified parts of facecategory
- C4A.4Merkel cell carcinoma of scalp and neck
- C4A.5Merkel cell carcinoma of trunkcategory
- C4A.6Merkel cell carcinoma of upper limb, including shouldercategory
- C4A.7Merkel cell carcinoma of lower limb, including hipcategory
- C4A.8Merkel cell carcinoma of overlapping sites
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
- Parent code
- C4A
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.