C7A.0 – Malignant carcinoid tumors

ICD-10-CM 2027 diagnosis code · Malignant neuroendocrine tumors (C7A)

Non-billable header

ICD-10-CM code C7A.0

Code: C7A.0 (claims format: C7A0)
Description: Malignant carcinoid tumors
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: C7A Malignant neuroendocrine tumors (C7A)
Parent codes: C7A

Billable codes under C7A.0

C7A.0 is a header code and cannot be used on claims. Choose the most specific code:

C7A.00 – Malignant carcinoid tumor of unspecified siteBillable
C7A.01 – Malignant carcinoid tumors of the small intestineHeader (more codes below)
C7A.02 – Malignant carcinoid tumors of the appendix, large intestine, and rectumHeader (more codes below)
C7A.09 – Malignant carcinoid tumors of other sitesHeader (more codes below)

Notes inherited from parent codes

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

C7A – Malignant neuroendocrine tumors

Excludes2 (not included here):

malignant pancreatic islet cell tumors (C25.4)
Merkel cell carcinoma (C4A.-)

Use additional code:

code to identify any associated endocrine syndrome, such as:
carcinoid syndrome (E34.00)

Code also:

any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)

Related codes in C7A

Frequently asked questions

What is ICD-10 code C7A.0?

C7A.0 is the ICD-10-CM code for malignant carcinoid tumors, in the block C7A (Malignant neuroendocrine tumors (C7A)).

Is C7A.0 a billable code?

No. C7A.0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does C7A.0 belong to?

It belongs to category C7A – Malignant neuroendocrine tumors.

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.