ICD-10-CM 2027 diagnosis code
C7A.0Malignant carcinoid tumors
C7A.0 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About C7A.0
C7A.0 is the ICD-10-CM diagnosis code for malignant carcinoid tumors. It belongs to category C7A (malignant neuroendocrine tumors), block C7A (malignant neuroendocrine tumors) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
Within C7A (malignant neuroendocrine tumors), C7A.0 is specifically for malignant carcinoid tumors. Related codes cover malignant poorly differentiated neuroendocrine tumors (C7A.1) and other malignant neuroendocrine tumors (C7A.8).
To report this condition, pick the subcode that matches the documentation: C7A.00 (site), C7A.01 (of the small intestine), C7A.02 (of the appendix, large intestine, and rectum) and C7A.09 (of other sites).
Use an additional code to identify any associated endocrine syndrome, such as: carcinoid syndrome (E34.00).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under C7A.0
- C7A.00Malignant carcinoid tumor of unspecified siteBillable
- C7A.01Malignant carcinoid tumors of the small intestine
- C7A.02Malignant carcinoid tumors of the appendix, large intestine, and rectum
- C7A.020Malignant carcinoid tumor of the appendixBillable
- C7A.021Malignant carcinoid tumor of the cecumBillable
- C7A.022Malignant carcinoid tumor of the ascending colonBillable
- C7A.023Malignant carcinoid tumor of the transverse colonBillable
- C7A.024Malignant carcinoid tumor of the descending colonBillable
- C7A.025Malignant carcinoid tumor of the sigmoid colonBillable
- C7A.026Malignant carcinoid tumor of the rectumBillable
- C7A.029Malignant carcinoid tumor of the large intestine, unspecified portionBillable
- C7A.09Malignant carcinoid tumors of other sites
- C7A.090Malignant carcinoid tumor of the bronchus and lungBillable
- C7A.091Malignant carcinoid tumor of the thymusBillable
- C7A.092Malignant carcinoid tumor of the stomachBillable
- C7A.093Malignant carcinoid tumor of the kidneyBillable
- C7A.094Malignant carcinoid tumor of the foregut, unspecifiedBillable
- C7A.095Malignant carcinoid tumor of the midgut, unspecifiedBillable
- C7A.096Malignant carcinoid tumor of the hindgut, unspecifiedBillable
- C7A.098Malignant carcinoid tumors of other sitesBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to C7A.0.
Broader instructions also apply from Chapter 2: Neoplasms.
Codes whose notes reference C7A.0
- C75Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about C7A.0
Is C7A.0 billable?
- No. C7A.0 is a header code. Report one of its more specific subcodes instead.