C4A.2
Header — not billableMerkel cell carcinoma of ear and external auricular canal
The ICD-10 code for merkel cell carcinoma of ear and external auricular canal is C4A.2.
C4A.2 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- C4A.0Merkel cell carcinoma of lip
- C4A.1Merkel cell carcinoma of eyelid, including canthusnon-billable header
- C4A.3Merkel cell carcinoma of other and unspecified parts of facenon-billable header
- C4A.4Merkel cell carcinoma of scalp and neck
- C4A.5Merkel cell carcinoma of trunknon-billable header
- C4A.6Merkel cell carcinoma of upper limb, including shouldernon-billable header
- C4A.7Merkel cell carcinoma of lower limb, including hipnon-billable header
- C4A.8Merkel cell carcinoma of overlapping sites
- C4A.9Merkel cell carcinoma, unspecified
- C4A.2Merkel cell carcinoma of ear and external auricular canalnon-billable header