|  C4A |  | Merkel cell carcinoma   | 
|  |  | 
	
		|  C4A.0 |  | Merkel cell carcinoma of lip |  
		|  |  | 
	
		| Excludes1 | malignant neoplasm of vermilion border of lip (C00.0-C00.2) 
 |  |  | 
|  |  | 
	
		|  C4A.1 |  | Merkel cell carcinoma of eyelid, including canthus |  |  |  | 
	
		|  C4A.10 |  | Merkel cell carcinoma of unspecified eyelid, including canthus |  |  |  |  | 
	
		|  C4A.11 |  | Merkel cell carcinoma of right eyelid, including canthus |  |  |  | 
	
		|  C4A.111 |  | Merkel cell carcinoma of right upper eyelid, including canthus |  |  |  |  | 
	
		|  C4A.112 |  | Merkel cell carcinoma of right lower eyelid, including canthus |  |  |  |  |  | 
	
		|  C4A.12 |  | Merkel cell carcinoma of left eyelid, including canthus |  |  |  | 
	
		|  C4A.121 |  | Merkel cell carcinoma of left upper eyelid, including canthus |  |  |  |  | 
	
		|  C4A.122 |  | Merkel cell carcinoma of left lower eyelid, including canthus |  |  |  | 
|  |  | 
	
		|  C4A.2 |  | Merkel cell carcinoma of ear and external auricular canal |  |  |  | 
	
		|  C4A.20 |  | Merkel cell carcinoma of unspecified ear and external auricular canal |  |  |  |  | 
	
		|  C4A.21 |  | Merkel cell carcinoma of right ear and external auricular canal |  |  |  |  | 
	
		|  C4A.22 |  | Merkel cell carcinoma of left ear and external auricular canal |  |  | 
|  |  | 
	
		|  C4A.3 |  | Merkel cell carcinoma of other and unspecified parts of face |  |  |  | 
	
		|  C4A.30 |  | Merkel cell carcinoma of unspecified part of face |  |  |  |  | 
	
		|  C4A.31 |  | Merkel cell carcinoma of nose |  |  |  |  | 
	
		|  C4A.39 |  | Merkel cell carcinoma of other parts of face |  |  | 
|  |  | 
	
		|  C4A.4 |  | Merkel cell carcinoma of scalp and neck |  | 
|  |  | 
	
		|  C4A.5 |  | Merkel cell carcinoma of trunk |  
		|  |  | 
	
		| Excludes2 | malignant neoplasm of anus NOS (C21.0) malignant neoplasm of scrotum (C63.2)
 
 |  |  |  |  | 
	
		|  C4A.51 |  | Merkel cell carcinoma of anal skin |  
		|  |  | 
| Merkel cell carcinoma of anal margin |  | Merkel cell carcinoma of perianal skin |  |  |  |  |  | 
	
		|  C4A.52 |  | Merkel cell carcinoma of skin of breast |  |  |  |  | 
	
		|  C4A.59 |  | Merkel cell carcinoma of other part of trunk |  |  | 
|  |  | 
	
		|  C4A.6 |  | Merkel cell carcinoma of upper limb, including shoulder |  |  |  | 
	
		|  C4A.60 |  | Merkel cell carcinoma of unspecified upper limb, including shoulder |  |  |  |  | 
	
		|  C4A.61 |  | Merkel cell carcinoma of right upper limb, including shoulder |  |  |  |  | 
	
		|  C4A.62 |  | Merkel cell carcinoma of left upper limb, including shoulder |  |  | 
|  |  | 
	
		|  C4A.7 |  | Merkel cell carcinoma of lower limb, including hip |  |  |  | 
	
		|  C4A.70 |  | Merkel cell carcinoma of unspecified lower limb, including hip |  |  |  |  | 
	
		|  C4A.71 |  | Merkel cell carcinoma of right lower limb, including hip |  |  |  |  | 
	
		|  C4A.72 |  | Merkel cell carcinoma of left lower limb, including hip |  |  | 
|  |  | 
	
		|  C4A.8 |  | Merkel cell carcinoma of overlapping sites |  | 
|  |  | 
	
		|  C4A.9 |  | Merkel cell carcinoma, unspecified |  
		|  |  | 
| Merkel cell carcinoma of unspecified site |  | Merkel cell carcinoma NOS |  |  |