C4A
Non-Billable
ChapterC00–D49
Rankcategory
Description
Merkel cell carcinoma
About ICD-10-CM code C4A
C4A is the ICD-10-CM diagnosis code for Merkel cell carcinoma. It sits in C00-D49 Neoplasms, within Melanoma and other malignant neoplasms of skin (C43-C44). C4A is not billable on its own, coders must choose one of its more specific child codes instead.
Use a more specific code (4 billable, 6 non-billable)
C4A.0Merkel cell carcinoma of lipC4A.1Merkel cell carcinoma of eyelid, including canthushas subcodesC4A.2Merkel cell carcinoma of ear and external auricular canalhas subcodesC4A.3Merkel cell carcinoma of other and unspecified parts of facehas subcodesC4A.4Merkel cell carcinoma of scalp and neckC4A.5Merkel cell carcinoma of trunkhas subcodesC4A.6Merkel cell carcinoma of upper limb, including shoulderhas subcodesC4A.7Merkel cell carcinoma of lower limb, including hiphas subcodesC4A.8Merkel cell carcinoma of overlapping sitesC4A.9Merkel cell carcinoma, unspecified
Metadata & Insights
- •Non-billable category (requires more specific sub-code).
- •Chapter 2: Neoplasms (C00-D49).
Clinical Hierarchy
BillableHas subcodes
MS-DRG Classification
No direct MS-DRG triggers identified.
Cross Reference
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