C80 ICD-10-CM Code: Malignant neoplasm without specification of site
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
C80Malignant neoplasm without specification of site
ICD-10-CM diagnosis code · United States clinical modification
Where C80 sits
- 1
Chapter 2
Neoplasms (C00-D49)
- 2
Section
Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
- 3
Category C80
Malignant neoplasm without specification of site
- 4
Code C80
Malignant neoplasm without specification of site
Codes under C80
C80 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for C80.
Code first
No “code first” instruction is listed for C80.
Use additional code
No “use additional code” instruction is listed for C80.
Excludes1
Conditions that should not be reported together with this code.
- malignant carcinoid tumor of unspecified site (C7A.00)
- malignant neoplasm of specified multiple sites- code to each site
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for C80.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code C80 mean?
C80 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm without specification of site.”
Is C80 a billable or specific ICD-10-CM code?
No. C80 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is C80 located in ICD-10-CM?
C80 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80) (C76–C80), under category C80, Malignant neoplasm without specification of site.
What coding notes are listed for C80?
No inclusion terms are listed for C80 in this reference record. No code-first instruction is listed. Excludes1 notes: malignant carcinoid tumor of unspecified site (C7A.00); malignant neoplasm of specified multiple sites- code to each site. No Excludes2 note is listed.