MCMedicalCodingSoftware
C80

C80: Malignant neoplasm without specification of site

Non-billable headerICD-10-CM

C80 is a non-billable header ICD-10-CM code for malignant neoplasm without specification of site. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • malignant carcinoid tumor of unspecified site (C7A.00)
  • malignant neoplasm of specified multiple sites- code to each site

Other codes that can never be billed with C80

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • C76Malignant neoplasm of other and ill-defined sites
  • C79.9Secondary malignant neoplasm of unspecified site

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead C80

3 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.