C34 vs J64
C34 (Malignant neoplasm of bronchus and lung) compared with J64 (Unspecified pneumoconiosis), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. J64 carries an Excludes2 note covering C34: “malignant neoplasm of bronchus and lung (C34.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| C34Malignant neoplasm of bronchus and lung | J64Unspecified pneumoconiosis | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Malignant neoplasm of bronchus and lung is a non-billable ICD-10-CM category code (C34). | Unspecified pneumoconiosis is a billable ICD-10-CM diagnosis code (J64). |
| Includes | malignant neoplasm of middle ear | — |
| Use additional code | code to identify: exposure to environmental tobacco smoke (Z77.22) exposure to tobacco smoke in the perinatal period (P96.81) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources