Non-Billable / Non-Specific Code
ICD-10-CM C80 is the diagnosis code for Malignant neoplasm without specification of site. This code falls under the section "Malignant neoplasms of ill-defined, other secondary and unspecified sites" within Chapter 2 — Neoplasms (C00-D49). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as C80. They are mutually exclusive:
Understanding where C80 sits in the ICD-10-CM classification helps ensure proper coding:
No, C80 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
C80 is the ICD-10-CM diagnosis code for "Malignant neoplasm without specification of site". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C80 is located in Section C76-C80 — "Malignant neoplasms of ill-defined, other secondary and unspecified sites" within Chapter 2 of the ICD-10-CM Tabular List.
C80 has 3 sub-code(s) that provide more specific detail: C80.0, C80.1, C80.2.
Use C80 when the patients documented diagnosis matches "Malignant neoplasm without specification of site" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Malignant neoplasm without specification of site is C80.
No, C80 is non-billable. Use a more specific sub-code for primary diagnosis billing.
C80 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C80 include: malignant carcinoid tumor of unspecified site (C7A.00); malignant neoplasm of specified multiple sites- code to each site.
Yes, C80 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.