Diagnosis Code


Code Information

Diagnosis Code: C45.1

Short Description: Mesothelioma of peritoneum

Long Description: Mesothelioma of peritoneum

The code C45.1 is VALID for claim submission

Code Classification:

  • Neoplasms (C00–D48)
    • Malignant neoplasms of mesothelial and soft tissue (C45-C49)
      • Mesothelioma (C45)
        • C45.1 Mesothelioma of peritoneum

Code Version: 2018 ICD-10-CM


  • Malignant mesothelioma of mesentery
  • Malignant mesothelioma of omentum
  • Malignant mesothelioma of parietal peritoneum
  • Malignant mesothelioma of pelvic peritoneum
  • Malignant mesothelioma of peritoneum
  • Malignant neoplasm of mesentery
  • Malignant neoplasm of omentum
  • Malignant tumor of mesothelial tissue
  • Mesothelioma
  • Neoplasm of mesothelial tissue of peritoneum
  • Neoplasm of omentum
  • Neoplasm of parietal peritoneum
  • Primary malignant neoplasm of omentum
  • Primary malignant neoplasm of parietal peritoneum
  • Primary malignant neoplasm of the mesentery

Diagnostic Related Group(s)

The code C45.1 is grouped in the following Diagnostic Related Group(s) (MS-DRG v34.0)
  • Digestive Malignancy With Mcc (374)
  • Digestive Malignancy With Cc (375)
  • Digestive Malignancy Without Cc/mcc (376)

References to Index of Diseases and Injuries

The code C45.1 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Mesothelioma of cul-de-sac
    • Mesothelioma of mesentery
    • Mesothelioma of mesocolon
    • Mesothelioma of omentum
    • Mesothelioma of peritoneum (parietal) (pelvic)
  • Type 1 Excludes Notes:
    • other malignant neoplasm of soft tissue of peritoneum (C48.-)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
C45.1 Right Arrow 158.8 Mal neo peritoneum NEC
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
C45 Mesothelioma
C45.0 Mesothelioma of pleura
C45.2 Mesothelioma of pericardium
C45.7 Mesothelioma of other sites
C45.9 Mesothelioma, unspecified

This page was last updated on: 1/1/2018