ICD-10-CM > C00-D49 > C30-C39 > C34 > C34.9 C34.9 Malignant neoplasm of unspecified part of bronchus or lung Non-Billable/Non-Specific Codes C34.90Malignant neoplasm of unspecified part of unspecified bronchus or lungC34.91Malignant neoplasm of unspecified part of right bronchus or lungC34.92Malignant neoplasm of unspecified part of left bronchus or lung