ICD-10 Code D15.2 – Benign neoplasm of mediastinum (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D15.2 – Benign neoplasm of mediastinum
What it is
D15.2 identifies a noncancerous tumor located in the mediastinum, the central chest space between the lungs. It is used when documentation states a benign mediastinal neoplasm.
Clinical signs
Clinical features vary; refer to documentation. Mediastinal masses may be found on imaging and can cause chest pressure, cough, or shortness of breath if they compress nearby structures.
When to use this code
Use D15.2 when the provider documents a benign neoplasm arising in the mediastinum, whether discovered incidentally or during workup of symptoms. Code it when pathology, imaging, or specialist assessment supports a benign mediastinal tumor. If the record only says “mass” or “lesion,” check documentation before assigning the code.
Do not use for
Do not use this code for malignant mediastinal tumors, metastatic disease, or nonspecific chest abnormalities. If the diagnosis is uncertain or not confirmed as benign, check documentation.
Coding tip
Assign D15.2 only when the benign mediastinal site is clearly documented; otherwise, query for the exact diagnosis and location.