Malignant neuroendocrine tumors (C7A)
ICD-10 codes C7A cover malignant neuroendocrine tumors, often called carcinoid tumors, which are rare cancers arising from neuroendocrine cells found in various organs. These codes specify tumor locations and differentiation, helping healthcare providers classify and manage these unique malignancies accurately.
The range begins with C7A.0, identifying malignant carcinoid tumors by site, such as the small intestine (C7A.01 with subcodes for duodenum, jejunum, and ileum), appendix and large intestine (C7A.02), and other sites including lung and thymus (C7A.09). Common synonyms like "well-differentiated neuroendocrine tumor" or "enterochromaffin cell tumor" connect clinical terms to the codes, aiding coders working from diagnosis to code. Unspecified site codes exist to cover tumors when exact location is unknown. The C7A.1 series captures poorly differentiated neuroendocrine tumors, which are more aggressive forms. Finally, C7A.8 includes other malignant neuroendocrine tumors that don’t fit prior categories, with synonyms encompassing diverse tumors like pancreatic neuroendocrine carcinoma or neuroendocrine carcinoma of the cervix, reflecting their broad organ involvement. This detailed coding supports precise medical documentation of these specialized cancers.
Neoplasms (C00–D49)
Malignant neuroendocrine tumors (C7A)
C7A Malignant neuroendocrine tumors
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
Malignant neuroendocrine tumors (C7A)
Instructional Notations
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- any associated multiple endocrine neoplasia [MEN] syndromes E31.2
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code to identify any associated endocrine syndrome, such as:
- carcinoid syndrome E34.00
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
