C34.10
BillableMalignant neoplasm of upper lobe, unspecified bronchus or lung
HCC Category Mapping
V28HCC 20 — Lung and Other Severe Cancers
0.000V24HCC 9 — Lung and Other Severe Cancers
0.973ESRDHCC 9 — Lung and Other Severe Cancers
0.000RxHCCHCC 20 — Cancer, Liver and Intrahepatic Bile Duct
0.000What This Code Means
Cancer that starts in the upper portion of the lung, but the specific side (left or right) is not specified.
Coding Tips
Clinical Significance
Upper lobe lung cancer without specified laterality is used when the tumor is known to be in the upper lobe but the side is not documented. The upper lobes are the most common sites for lung cancer. This code captures the lobar specificity while flagging a laterality documentation gap that should be addressed.
Documentation Requirements
- ✓Pathology or imaging confirming upper lobe location
- ✓Evidence that laterality was sought but not available
- ✓Histological type and molecular markers for targeted therapy
- ✓TNM staging
- ✓Provider query documentation for laterality
Commonly Confused Codes
C34.11/C34.12 — Right/left upper lobe: Always assign laterality when documentedC34.90 — Lung, unspecified: C34.10 is more specific with lobar informationC34.00 — Main bronchus: Central hilar tumors may involve both the upper lobe and main bronchusC34.2 — Middle lobe: Only on the right; rule out middle lobe before coding upper lobe
Code Hierarchy
└C34Malignant neoplasm of bronchus and lung└C34.1Malignant neoplasm of upper lobe, bronchus or lung└C34.10Malignant neoplasm of upper lobe, unspecified bronchus or lung
└C34.10Malignant neoplasm of upper lobe, unspecified bronchus or lung