C00 vs C43.0
C00 (Malignant neoplasm of lip) compared with C43.0 (Malignant melanoma of lip), 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. C00 carries an Excludes1 note covering C43.0: “malignant melanoma of lip (C43.0)”
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
| C00Malignant neoplasm of lip | C43.0Malignant melanoma of lip | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of lip is a non-billable ICD-10-CM category code (C00). | Malignant melanoma of lip is a billable ICD-10-CM diagnosis code (C43.0). |
| Use additional code | code to identify: alcohol abuse and dependence (F10.-) history of tobacco dependence (Z87.891) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources