DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

C45 Mesothelioma

  • Header · not billable

C45 is not billable. The category heads 5 billable codes in FY2027: the 5 codes directly below it.

Index → code

  • Mesothelioma (malignant) → C45.9
  • Mesothelioma (malignant)fibrous → C45.9
  • Mesothelioma (malignant)biphasic → C45.9

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. C45-C49 Malignant neoplasms of mesothelial and soft tissue (C45-C49)
  3. C45 Mesothelioma
Billable codes
5
Subdivisions
5
CC / MCC codes
3 / 0
HCC V28 codes
5
New FY2027
0
Index entries
17

Codes in C45

  1. C45.0
    Mesothelioma of pleura
    BillableCC19
    Excludes1 1

    Excludes1

    • other malignant neoplasm of pleura (C38.4) C38.4
  2. C45.1
    Mesothelioma of peritoneum
    BillableCC19
    Inclusion terms 5, Excludes1 1

    Inclusion terms

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

    Excludes1

    • other malignant neoplasm of soft tissue of peritoneum (C48.-) C48
  3. C45.2
    Mesothelioma of pericardium
    BillableCC19
    Excludes1 1

    Excludes1

    • other malignant neoplasm of pericardium (C38.0) C38.0
  4. C45.7
    Mesothelioma of other sites
    Billable19
  5. C45.9
    Mesothelioma, unspecified
    Billable19

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Index entries

  • Mesothelioma (malignant) → C45.9
  • Mesothelioma (malignant)biphasic → C45.9
  • Mesothelioma (malignant)epithelioid → C45.9
  • Mesothelioma (malignant)fibrous → C45.9
  • Mesothelioma (malignant)site classificationpleura → C45.0
  • Mesothelioma (malignant)site classificationmesentery → C45.1
  • Mesothelioma (malignant)site classificationmesocolon → C45.1
  • Mesothelioma (malignant)site classificationomentum → C45.1
  • Mesothelioma (malignant)site classificationperitoneum → C45.1
  • Mesothelioma (malignant)site classificationpericardium → C45.2
  • Mesothelioma (malignant)site classificationliver → C45.7
  • Mesothelioma (malignant)site classificationlung → C45.7
  • Mesothelioma (malignant)site classificationmediastinum → C45.7
  • Mesothelioma (malignant)site classificationretroperitoneum → C45.7
  • Mesothelioma (malignant)site classificationspecified site NEC → C45.7
  • Mesothelioma (malignant)site classificationunspecified → C45.9
  • Mesothelioma (malignant)site classificationpleuraparietal → C45.0

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy