C38.8
BillableMalignant neoplasm of overlapping sites of heart, mediastinum and pleura
HCC Category Mapping
V28HCC 21 — Breast, Prostate, Colorectal and Other Cancers and Tumors
0.545V24HCC 11 — Colorectal, Bladder, and Other Cancers
0.306ESRDHCC 11 — Colorectal, Bladder, and Other Cancers
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Cancer that involves multiple overlapping areas including the heart, mediastinum, and pleura.
Coding Tips
- •Use this code only when the tumor spans two or more of these anatomical sites
- •Document which specific sites are involved to support medical necessity
Clinical Significance
This code captures malignancies that span multiple intrathoracic sites including the heart, mediastinum, and pleura. These represent locally advanced disease with poor prognosis, often reflecting aggressive tumors that have extended beyond their site of origin. Complex surgical and oncological management drives high healthcare resource utilization.
Documentation Requirements
- ✓Imaging documenting tumor involvement of two or more intrathoracic sites (heart, mediastinum, pleura)
- ✓Pathology confirming malignancy
- ✓Documentation specifying which sites are involved
- ✓Confirmation that the overlapping sites represent a single primary tumor, not metastatic deposits
- ✓Treatment plan and disease stage
Commonly Confused Codes
C38.0-C38.4 — Specific intrathoracic site codes: If a primary site is identifiable, code the primary siteC38.3 — Unspecified mediastinum: C38.8 requires documented multi-site involvement; do not default here for vague documentationC78.2 — Secondary pleural cancer and C78.00 — Secondary lung cancer: Ensure overlapping is primary, not metastaticC37 — Thymic cancer: If thymic origin is identifiable despite mediastinal extension, use C37