ICD-10-CM C45.1 is the diagnosis code for Mesothelioma of peritoneum. This code falls under the section "Malignant neoplasms of mesothelial and soft tissue" within Chapter 2 — Neoplasms (C00-D49). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as C45.1. They are mutually exclusive:
Understanding where C45.1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C45.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C45.1 is the ICD-10-CM diagnosis code for "Mesothelioma of peritoneum". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of C45.1 is C45 ("Mesothelioma"). C45.1 provides a more specific classification within this category.
C45.1 is located in Section C45-C49 — "Malignant neoplasms of mesothelial and soft tissue" within Chapter 2 of the ICD-10-CM Tabular List.
Use C45.1 when the patients documented diagnosis matches "Mesothelioma of peritoneum" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Mesothelioma of peritoneum is C45.1.
Yes, C45.1 can be used as a primary diagnosis code since it is billable and specific.
C45.1 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C45.1 include: other malignant neoplasm of soft tissue of peritoneum (C48.-).
Yes, C45.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.