C38.3: Malignant neoplasm of mediastinum, part unspecified
C38.3 is the billable ICD-10-CM diagnosis code for Malignant neoplasm of mediastinum, part unspecified. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code C38.3?
C38.3 is the ICD-10-CM diagnosis code for Malignant neoplasm of mediastinum, part unspecified. It belongs to category C38 (Malignant neoplasm of heart, mediastinum and pleura).
Is C38.3 a billable code?
Yes. C38.3 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does C38.3 belong to?
C38.3 is part of ICD-10-CM category C38 — Malignant neoplasm of heart, mediastinum and pleura, which has 12 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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