All ICD10 Codes

C4A.2

Non-Billable
ChapterC00–D49
Ranksubcategory
Official Description

Merkel cell carcinoma of ear and external auricular canal

Use a more specific code (3 billable)
C4A.20Merkel cell carcinoma of unspecified ear and external auricular canalC4A.21Merkel cell carcinoma of right ear and external auricular canalC4A.22Merkel cell carcinoma of left ear and external auricular canal
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 2: Neoplasms (C00-D49).

Clinical Hierarchy

BillableHas subcodes
CH2Neoplasms (C00-D49)
C43-C44Melanoma and other malignant neoplasms of skin (C43-C44)
C4AMerkel cell carcinoma
C4A.2Merkel cell carcinoma of ear and external auricular canalNot billable
C4A.20Merkel cell carcinoma of unspecified ear and external auricular canalBillable
C4A.21Merkel cell carcinoma of right ear and external auricular canalBillable
C4A.22Merkel cell carcinoma of left ear and external auricular canalBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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