Icd 10 code for mediastinoscopy with biopsy for mediastinal mass?

The ICD-10 code for a mediastinoscopy with biopsy for a mediastinal mass typically falls under the category of "Malignant neoplasm of mediastinum" (C38.4) if the mass is cancerous. If the mass is benign, you might use codes like D38.0 for benign neoplasm of the mediastinum. It's essential to specify the nature of the mass when coding, as the exact code can vary based on the diagnosis. Always consult the latest coding guidelines or a coding specialist for accurate coding.