C34.1 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
C34.10
Malignant neoplasm of upper lobe, unspecified bronchus or lung
Billable
10
C34.11
Malignant neoplasm of upper lobe, right bronchus or lung
Billable
10
C34.12
Malignant neoplasm of upper lobe, left bronchus or lung
Billable