ICD-10 Code D17.4 – Benign lipomatous neoplasm of intrathoracic organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D17.4 – Benign lipomatous neoplasm of intrathoracic organs
What it is
This code identifies a benign fatty tumor arising in intrathoracic organs or structures. It means the growth is noncancerous and located within the chest rather than in the chest wall or skin.
Clinical signs
Clinical features vary; refer to documentation. These lesions may be found incidentally on imaging or during evaluation of a chest mass, with pathology confirming a lipomatous, benign process.
When to use this code
Use D17.4 when the provider documents a benign lipoma or other benign lipomatous neoplasm specifically involving intrathoracic organs. It is appropriate when the diagnosis is confirmed by imaging, surgery, or pathology and the site is clearly intrathoracic. Check documentation if the record only says “lipoma” without location.
Do not use for
Do not use this code for malignant liposarcoma, nonspecific chest wall lipoma, or lipomatous tumors outside the thorax. If the anatomic site is unclear, check documentation.
Coding tip
Confirm both benign behavior and intrathoracic location before assigning D17.4.