C4A.5 – Merkel cell carcinoma of trunk

Code

C4A.5 (claims format: C4A5)

Description

Merkel cell carcinoma of trunk

Billable

No – use a more specific code below

Valid for

Dates of service October 1, 2026 – September 30, 2027 (FY2027)

Chapter

2. Neoplasms (C00-D49)

Block

C43-C44 Melanoma and other malignant neoplasms of skin

Parent codes

C4A

Billable codes under C4A.5

C4A.5 is a header code and cannot be used on claims. Choose the most specific code:

• C4A.51 – Merkel cell carcinoma of anal skinBillable
• C4A.52 – Merkel cell carcinoma of skin of breastBillable
• C4A.59 – Merkel cell carcinoma of other part of trunkBillable

Notes for C4A.5

Related codes in C4A

• C4A.0 – Merkel cell carcinoma of lipBillable
• C4A.1 – Merkel cell carcinoma of eyelid, including canthusHeader
• C4A.2 – Merkel cell carcinoma of ear and external auricular canalHeader
• C4A.3 – Merkel cell carcinoma of other and unspecified parts of faceHeader
• C4A.4 – Merkel cell carcinoma of scalp and neckBillable
• C4A.6 – Merkel cell carcinoma of upper limb, including shoulderHeader
• C4A.7 – Merkel cell carcinoma of lower limb, including hipHeader
• C4A.8 – Merkel cell carcinoma of overlapping sitesBillable
• C4A.9 – Merkel cell carcinoma, unspecifiedBillable