Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80) ICD-10-CM
The C76–C80 section covers malignant neoplasms of ill-defined, other secondary and unspecified sites with 38 ICD-10-CM diagnosis codes, of which 31 are billable in fiscal year 2027. The section is organized into the 2 code ranges listed below.
Code Ranges in This Section 2 ranges · 38 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| C7A | Malignant neuroendocrine tumors (C7A) | 28 | 23 |
| C7B | Secondary neuroendocrine tumors (C7B) | 10 | 8 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the C76–C80 Code Range
These categories describe cancer at an ill-defined site, cancer in lymph nodes, cancer that has spread elsewhere, and cancer without a specified site.
C76 separates other and ill-defined cancer sites by body region, such as the head, abdomen, or limbs. C77 separates cancer in lymph nodes by region, including multiple regions and an unspecified lymph node.
C78 identifies respiratory or digestive organs where cancer has spread. C79 identifies other sites, such as skin, brain, bone, and ovary, as well as an unspecified site. C80 distinguishes disseminated cancer, unspecified primary cancer, and cancer associated with a transplanted organ.
FY 2027 changes: The FY 2027 ICD-10-CM update, effective October 1, 2026, added C78.31, C78.32 and C79.83.
Questions About This Page
How many codes are in the C76-C80 range?
The C76-C80 range contains 38 ICD-10-CM diagnosis codes in FY 2027. 31 of them are billable, and the rest are category headers that organize the section.
What conditions does C76-C80 cover?
The range covers malignant neoplasms of ill-defined, other secondary and unspecified sites. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
