ICD-10-CM · Chapter 2 · C00-D49
C48 Malignant neoplasm of retroperitoneum and peritoneum
4 subcodes
Block: Malignant neoplasms of mesothelial and soft tissue (C45-C49)
Excludes 1 (cannot be coded together)
- Kaposi's sarcoma of connective tissue (C46.1)
- mesothelioma (C45.-)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
| C48..0 | Malignant neoplasm of retroperitoneum | Yes |
| C48..1 | Malignant neoplasm of specified parts of peritoneum | Yes |
| C48..2 | Malignant neoplasm of peritoneum, unspecified | Yes |
| C48..8 | Malignant neoplasm of overlapping sites of retroperitoneum and peritoneum | Yes |
Last reviewed: September 2026