ICD-10-CM C7A: Malignant neuroendocrine tumors

ICD-10-CM Diagnosis Code (2025)

Official Description for C7A

Malignant neuroendocrine tumors

Coding Notes & Guidelines for C7A

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)
Inclusion Terms

Malignant carcinoid tumor of the colon NOS

Inclusion Terms
  • Malignant poorly differentiated neuroendocrine tumor NOS
  • Malignant poorly differentiated neuroendocrine carcinoma, any site
  • High grade neuroendocrine carcinoma, any site
Code Also

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

Child Codes (More Specific Codes for C7A):

C7A.0 - Malignant carcinoid tumors C7A.00 - Malignant carcinoid tumor of unspecified site C7A.01 - Malignant carcinoid tumors of the small intestine C7A.010 - Malignant carcinoid tumor of the duodenum C7A.011 - Malignant carcinoid tumor of the jejunum C7A.012 - Malignant carcinoid tumor of the ileum C7A.019 - Malignant carcinoid tumor of the small intestine, unspecified portion C7A.02 - Malignant carcinoid tumors of the appendix, large intestine, and rectum C7A.020 - Malignant carcinoid tumor of the appendix C7A.021 - Malignant carcinoid tumor of the cecum C7A.022 - Malignant carcinoid tumor of the ascending colon C7A.023 - Malignant carcinoid tumor of the transverse colon C7A.024 - Malignant carcinoid tumor of the descending colon C7A.025 - Malignant carcinoid tumor of the sigmoid colon C7A.026 - Malignant carcinoid tumor of the rectum C7A.029 - Malignant carcinoid tumor of the large intestine, unspecified portion C7A.09 - Malignant carcinoid tumors of other sites C7A.090 - Malignant carcinoid tumor of the bronchus and lung C7A.091 - Malignant carcinoid tumor of the thymus C7A.092 - Malignant carcinoid tumor of the stomach C7A.093 - Malignant carcinoid tumor of the kidney C7A.094 - Malignant carcinoid tumor of the foregut, unspecified C7A.095 - Malignant carcinoid tumor of the midgut, unspecified C7A.096 - Malignant carcinoid tumor of the hindgut, unspecified C7A.098 - Malignant carcinoid tumors of other sites C7A.1 - Malignant poorly differentiated neuroendocrine tumors C7A.8 - Other malignant neuroendocrine tumors

About ICD-10-CM Code C7A (Malignant neuroendocrine tumors)

ICD-10-CM code C7A is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C7A became effective on October 1, 2024.

This page provides detailed information about C7A - Malignant neuroendocrine tumors. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant neuroendocrine tumors.