ICD-10-CM C80: Malignant neoplasm without specification of site

ICD-10-CM Diagnosis Code (2025)

Official Description for C80

Malignant neoplasm without specification of site

Coding Notes & Guidelines for C80

Excludes1: Not Coded Here
  • malignant carcinoid tumor of unspecified site (C7A.00)
  • malignant neoplasm of specified multiple sites- code to each site
Excludes1: Not Coded Here

secondary malignant neoplasm of unspecified site (C79.9)

Code First

complication of transplanted organ (T86.-)

Use Additional Code

code to identify the specific malignancy

Inclusion Terms
  • Carcinomatosis NOS
  • Generalized cancer, unspecified site (primary) (secondary)
  • Generalized malignancy, unspecified site (primary) (secondary)
Inclusion Terms
  • Cancer NOS
  • Cancer unspecified site (primary)
  • Carcinoma unspecified site (primary)
  • Malignancy unspecified site (primary)

Child Codes (More Specific Codes for C80):

C80.0 - Disseminated malignant neoplasm, unspecified C80.1 - Malignant (primary) neoplasm, unspecified C80.2 - Malignant neoplasm associated with transplanted organ

About ICD-10-CM Code C80 (Malignant neoplasm without specification of site)

ICD-10-CM code C80 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C80 became effective on October 1, 2024.

This page provides detailed information about C80 - Malignant neoplasm without specification of site. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant neoplasm without specification of site.