C4A.59 – Merkel cell carcinoma of other part of trunk

ICD-10-CM 2027 diagnosis code · Melanoma and other malignant neoplasms of skin

Billable code

ICD-10-CM code C4A.59
Code
C4A.59 (claims format: C4A59)
Description
Merkel cell carcinoma of other part of trunk
Billable
Yes – valid for HIPAA-covered transactions
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 › C4A.5

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

C4A.5 – Merkel cell carcinoma of trunk

Excludes2 (not included here):
  • malignant neoplasm of anus NOS (C21.0)
  • malignant neoplasm of scrotum (C63.2)

Index terms for C4A.59

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in C4A.5

Frequently asked questions

What is ICD-10 code C4A.59?

C4A.59 is the ICD-10-CM code for merkel cell carcinoma of other part of trunk, in the block C43-C44 (Melanoma and other malignant neoplasms of skin).

Is C4A.59 a billable code?

Yes. C4A.59 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C4A.59 belong to?

It belongs to category C4A – Merkel cell carcinoma.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.