C45.1 – Mesothelioma of peritoneum
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of mesothelial and soft tissue
ICD-10-CM code
C45.1
- Code
C45.1(claims format:C451)- Description
- Mesothelioma of peritoneum
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C45-C49 Malignant neoplasms of mesothelial and soft tissue
- Parent codes
- C45
Notes for C45.1
Applicable to:
- Mesothelioma of cul-de-sac
- Mesothelioma of mesentery
- Mesothelioma of mesocolon
- Mesothelioma of omentum
- Mesothelioma of peritoneum (parietal) (pelvic)
Excludes1 (not coded here):
- other malignant neoplasm of soft tissue of peritoneum (C48.-)
Index terms for C45.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in C45
Frequently asked questions
What is ICD-10 code C45.1?
C45.1 is the ICD-10-CM code for mesothelioma of peritoneum, in the block C45-C49 (Malignant neoplasms of mesothelial and soft tissue).
Is C45.1 a billable code?
Yes. C45.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C45.1 belong to?
It belongs to category C45 – Mesothelioma.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.