Malignant neoplasm of retroperitoneum and peritoneum (C48) ICD-10-CM
The C48 code range covers malignant neoplasm of retroperitoneum and peritoneum with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the C48 Range 5 codes · 4 billable
- C48 Malignant neoplasm of retroperitoneum and peritoneumNon-billable
- C48.0 Malignant neoplasm of retroperitoneum
- C48.1 Malignant neoplasm of specified parts of peritoneum
- C48.2 Malignant neoplasm of peritoneum, unspecified
- C48.8 Malignant neoplasm of overlapping sites of retroperitoneum and peritoneum
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C48 range.
Malignant Peritoneal Neoplasm
A primary or metastatic malignant neoplasm involving the peritoneum. Representative examples include carcinoma and malignant mesothelioma.
Malignant Retroperitoneal Neoplasm
A primary or metastatic malignant neoplasm involving the retroperitoneum. The vast majority of cases are carcinomas, lymphomas, or sarcomas.
About the C48 Code Range
These cancers occur in the retroperitoneum, the peritoneum, or sites that overlap both.
The subdivisions distinguish the site. C48.0 identifies the retroperitoneum. C48.1 identifies a specified part of the peritoneum, while C48.2 leaves the part unspecified. C48.8 identifies overlapping sites of the retroperitoneum and peritoneum.
Questions About This Page
How many billable codes are in the C48 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C48 range classify?
The range classifies malignant neoplasm of retroperitoneum and peritoneum. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
