C34.31 (Malignant neoplasm of lower lobe, right bronchus or lung) compared with C34.32 (Malignant neoplasm of lower lobe, left bronchus or lung), from the official CMS tabular data. C34.31 and C34.32 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. C34.31 and C34.32 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| C34.31Malignant neoplasm of lower lobe, right bronchus or lung | C34.32Malignant neoplasm of lower lobe, left bronchus or lung | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Malignant neoplasm of lower lobe, right bronchus or lung is a billable ICD-10-CM diagnosis code (C34.31). | Malignant neoplasm of lower lobe, left bronchus or lung is a billable ICD-10-CM diagnosis code (C34.32). |
| Includes | malignant neoplasm of middle ear | 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) | 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