C45.1

ICD-10Billable

Mesothelioma of peritoneum

Official ICD-10-CM descriptor (FY2026)

Mesothelioma of peritoneum

C45.1 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

  • Mesothelioma of cul-de-sac
  • Mesothelioma of mesentery
  • Mesothelioma of mesocolon
  • Mesothelioma of omentum
  • Mesothelioma of peritoneum (parietal) (pelvic)

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • other malignant neoplasm of soft tissue of peritoneum (C48.-)

Related codes in C45

Where this code sits

Parent code
C45

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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