Secondary neuroendocrine tumors (C7B) ICD-10-CM
The C7B code range covers secondary neuroendocrine tumors with 10 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
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 functional activity
Codes in the C7B Range 10 codes · 8 billable
- C7B Secondary neuroendocrine tumorsNon-billable
- C7B.0 Secondary carcinoid tumorsNon-billable
- C7B.00 Secondary carcinoid tumors, unspecified site
- C7B.01 Secondary carcinoid tumors of distant lymph nodes
- C7B.02 Secondary carcinoid tumors of liver
- C7B.03 Secondary carcinoid tumors of bone
- C7B.04 Secondary carcinoid tumors of peritoneum
- C7B.09 Secondary carcinoid tumors of other sites
- C7B.1 Secondary Merkel cell carcinoma
- C7B.8 Other secondary neuroendocrine tumors
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C7B range.
Metastatic Merkel Cell Carcinoma
A Merkel cell carcinoma that has spread from the original site of growth to another anatomic site.
Metastatic Neuroendocrine Tumor
A neuroendocrine tumor that has spread from its original site of growth to another anatomic site.
About the C7B Code Range
These neuroendocrine tumors have spread from where they first grew to another part of the body.
Within C7B, the subdivisions distinguish secondary carcinoid tumors (C7B.0), secondary Merkel cell carcinoma (C7B.1), and other secondary neuroendocrine tumors (C7B.8).
Questions About This Page
How many billable codes are in the C7B range?
Of the 10 codes in this range, 8 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C7B range classify?
The range classifies secondary neuroendocrine tumors. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
