ICD-10-CM Alphabetic Index · FY 2026 51 Entries
Mesothelioma in the ICD-10-CM Index ICD-10-CM
The main term Mesothelioma (malignant) carries 51 index entries pointing to 10 ICD-10-CM codes. The default entry is C45.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
51
Index Entries
10
Codes Referenced
C45.9
Default Code
M
Letter
51 of 51 shown
ICD-10-CM
Index Entries Under Mesothelioma 51 entries · 10 codes
Mesothelioma (malignant) C45.9
benign
mesentery D19.1
mesocolon D19.1
omentum D19.1
peritoneum D19.1
pleura D19.0
specified site NEC D19.7
unspecified site D19.9
biphasic C45.9
benign
mesentery D19.1
mesocolon D19.1
omentum D19.1
peritoneum D19.1
pleura D19.0
specified site NEC D19.7
unspecified site D19.9
cystic D48.4
epithelioid C45.9
benign
mesentery D19.1
mesocolon D19.1
omentum D19.1
peritoneum D19.1
pleura D19.0
specified site NEC D19.7
unspecified site D19.9
fibrous C45.9
benign
mesentery D19.1
mesocolon D19.1
omentum D19.1
peritoneum D19.1
pleura D19.0
specified site NEC D19.7
unspecified site D19.9
site classification
liver C45.7
lung C45.7
mediastinum C45.7
mesentery C45.1
mesocolon C45.1
omentum C45.1
pericardium C45.2
peritoneum C45.1
pleura C45.0
parietal C45.0
retroperitoneum C45.7
specified site NEC C45.7
unspecified C45.9
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
