C7A.00 vs C80
C7A.00 (Malignant carcinoid tumor of unspecified site) compared with C80 (Malignant neoplasm without specification of site), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. C80 carries an Excludes1 note covering C7A.00: “malignant carcinoid tumor of unspecified site (C7A.00)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| C7A.00Malignant carcinoid tumor of unspecified site | C80Malignant neoplasm without specification of site | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant carcinoid tumor of unspecified site is a billable ICD-10-CM diagnosis code (C7A.00). | Malignant neoplasm without specification of site is a non-billable ICD-10-CM category code (C80). |
| Use additional code | code to identify any associated endocrine syndrome, such as: carcinoid syndrome (E34.00) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources