ICD-10-CM 2027 diagnosis code

C7B.0Secondary carcinoid tumors

Not billable — use a more specific code

C7B.0 is a header code, so it can't be reported by itself. Choose one of the 6 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 C7B.0

C7B.0 is the ICD-10-CM diagnosis code for secondary carcinoid tumors. It belongs to category C7B (secondary neuroendocrine tumors), block C7B (secondary neuroendocrine tumors) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within C7B (secondary neuroendocrine tumors), C7B.0 is specifically for secondary carcinoid tumors. Related codes cover secondary Merkel cell carcinoma (C7B.1) and other secondary neuroendocrine tumors (C7B.8).

To report this condition, pick the subcode that matches the documentation: C7B.00 (unspecified site), C7B.01 (of distant lymph nodes), C7B.02 (of liver), C7B.03 (of bone), C7B.04 (of peritoneum) and C7B.09 (of other sites).

Use an additional code to identify any functional activity.

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 C7B.0

Notes that apply from higher levels

Instructions written at a parent level also apply to C7B.0.

› From C7B Secondary neuroendocrine tumors

Use additional code

code to identify any functional activity

Broader instructions also apply from Chapter 2: Neoplasms.

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 C7B.0

Is C7B.0 billable?: No. C7B.0 is a header code. Report one of its more specific subcodes instead.