Mesothelioma
In Malignant neoplasms of mesothelial and soft tissue (C45-C49), chapter 2: Neoplasms
5 billable codes under C45: 3 are a CC; all map to HCC 19 (Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.
- Admission/Encounter for treatment of primary site (page 33)
- Admission/Encounter for treatment of secondary site (page 33)
- Coding and sequencing of complications (page 34)
- Primary malignancy previously excised (page 34)
- Admissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy (page 35)
- Admission/encounter to determine extent of malignancy (page 36)
- Symptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms (page 36)
- Admission/encounter for pain control/management (page 36)
All codes under C45
C45 can't be used on a claim. Pick a billable code below; grey headings group them.
C45 MS-DRGs
As the principal diagnosis, the billable codes under C45 group to these 17 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 826 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCC (2 of 5 codes)
- DRG 827 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CC (2 of 5 codes)
- DRG 828 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCC (2 of 5 codes)
- DRG 829 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures with CC/MCC (2 of 5 codes)
- DRG 830 Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Other Procedures without CC/MCC (2 of 5 codes)
- DRG 843 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC (2 of 5 codes)
- DRG 844 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC (2 of 5 codes)
- DRG 845 Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC (2 of 5 codes)
- DRG 180 Respiratory Neoplasms with MCC (1 of 5 codes)
- DRG 181 Respiratory Neoplasms with CC (1 of 5 codes)
- DRG 182 Respiratory Neoplasms without CC/MCC (1 of 5 codes)
- DRG 314 Other Circulatory System Diagnoses with MCC (1 of 5 codes)
- DRG 315 Other Circulatory System Diagnoses with CC (1 of 5 codes)
- DRG 316 Other Circulatory System Diagnoses without CC/MCC (1 of 5 codes)
- DRG 374 Digestive Malignancy with MCC (1 of 5 codes)
- DRG 375 Digestive Malignancy with CC (1 of 5 codes)
- DRG 376 Digestive Malignancy without CC/MCC (1 of 5 codes)
Other codes that refer to C45
Notes on these codes point to C45.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Mesothelioma
The tissue that lines your lungs, stomach, heart, and other organs is called mesothelium. Mesothelioma, also known as malignant mesothelioma, is cancer of that tissue. It usually starts in the lungs, but can also start in the abdomen or other organs.
Read more about mesothelioma on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.