ICD-10 Code D15 – Benign neoplasm of other and unspecified intrathoracic organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D15 – Benign neoplasm of other and unspecified intrathoracic organs
What it is
D15 identifies a benign, noncancerous tumor arising in intrathoracic organs that are not separately classified. It is used when the record documents a benign neoplasm in the chest, but the exact organ is other or unspecified.
Clinical signs
Clinical features vary; refer to documentation. These lesions may be found incidentally on imaging or during evaluation of chest symptoms, and pathology or imaging is typically used to confirm benign behavior.
When to use this code
Use D15 when the provider documents a benign neoplasm involving an intrathoracic organ and does not name a more specific code. It also fits cases where the chart states “other” or “unspecified” intrathoracic site. Code the confirmed benign diagnosis, not a suspected mass.
Do not use for
Do not use D15 for malignant neoplasms, metastatic disease, or lesions documented as uncertain behavior. If the specific organ is identified and has a more precise code, choose that code instead. Check documentation.
Coding tip
Confirm both benign behavior and intrathoracic location before assigning D15.