C80 – Malignant neoplasm without specification of site
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of ill-defined, other secondary and unspecified sites
ICD-10-CM code
C80
- Code
C80(claims format:C80)- Description
- Malignant neoplasm without specification of site
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites
Billable codes under C80
C80 is a header code and cannot be used on claims. Choose the most specific code:
Notes for C80
Excludes1 (not coded here):
- malignant carcinoid tumor of unspecified site (C7A.00)
- malignant neoplasm of specified multiple sites- code to each site
Frequently asked questions
What is ICD-10 code C80?
C80 is the ICD-10-CM code for malignant neoplasm without specification of site, in the block C76-C80 (Malignant neoplasms of ill-defined, other secondary and unspecified sites).
Is C80 a billable code?
No. C80 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.