C4A.12
Header — not billableMerkel cell carcinoma of left eyelid, including canthus
The ICD-10 code for merkel cell carcinoma of left eyelid, including canthus is C4A.12.
C4A.12 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 2 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.10Merkel cell carcinoma of unspecified eyelid, including canthus
- C4A.11Merkel cell carcinoma of right eyelid, including canthusnon-billable header
- C4A.12Merkel cell carcinoma of left eyelid, including canthusnon-billable header
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 20931Approximate match