C7A

Non-Billable

ChapterC00–D49

Rankcategory

Official Description

Malignant neuroendocrine tumors

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 2: Neoplasms (C00-D49).

Instructional Notes

Excludes2(Not included here)

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

Code Also

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

Use Additional Code

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

Clinical Hierarchy

CH2Neoplasms (C00-D49)

C7AMalignant neuroendocrine tumors

C7A.0Malignant carcinoid tumors

C7A.1Malignant poorly differentiated neuroendocrine tumors

C7A.8Other malignant neuroendocrine tumors

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to C7A. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths

Carcinoma (malignant)2 unique routes

neuroendocrine(2 variants)

high grade, any site→C7A

poorly differentiated, any site→C7A

Tumor23 unique routes

carcinoid(23 variants)

malignant→C7A(23 variants)

appendix→C7A

ascending colon→C7A

bronchus (lung)→C7A

cecum→C7A

colon→C7A

descending colon→C7A

duodenum→C7A

foregut NOS→C7A

hindgut NOS→C7A

ileum→C7A

jejunum→C7A

kidney→C7A

rectum→C7A

specified NEC→C7A

stomach→C7A

thymus→C7A

transverse colon→C7A

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Malignant neuroendocrine tumors.

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