Merkel cell carcinoma C4A

The ICD10 code for the diagnosis "Merkel cell carcinoma" is "C4A". C4A is NOT a 'valid' or 'billable' ICD10 code. Please select a more specific diagnosis below.

• C4A should not be used for reimbursement purposes. Please select a more specific diagnosis below.
• The 2019 edition of ICD-10-CM C4A became effective on October 1, 2018.
• This is the American ICD-10-CM version of C4A - other international versions of ICD-10 C4A may differ.

Codes: = Billable

• C4A Merkel cell carcinoma
  • C4A.0 Merkel cell carcinoma of lip
  • C4A.1 Merkel cell carcinoma of eyelid, including canthus
  • C4A.2 Merkel cell carcinoma of ear and external auricular canal
  • C4A.3 Merkel cell carcinoma of other and unspecified parts of face
  • C4A.4 Merkel cell carcinoma of scalp and neck
  • C4A.5 Merkel cell carcinoma of trunk
  • C4A.6 Merkel cell carcinoma of upper limb, including shoulder
  • C4A.7 Merkel cell carcinoma of lower limb, including hip
  • C4A.8 Merkel cell carcinoma of overlapping sites
  • C4A.9 Merkel cell carcinoma, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.