Mediastinal Mass ICD-10-CM Codes

Find the latest and most accurate Mediastinal Mass ICD-10-CM codes. Boost your coding expertise and enrich your clinical documentation practices.

By Olivia Sayson on Aug 8, 2025.

Fact Checked by Ericka Pingol.

Use Code

What ICD-10 Codes Are Used for Mediastinal Mass?

Mediastinal Mass ICD codes are essential for detailed medical billing and accurate clinical documentation. Below are some commonly used ones:

R91.8 - Other nonspecific abnormal findings of lung field: This code is used when the patient's medical records indicate an uncommon lung field result, including a mediastinal mass.
D14.1 - Benign neoplasm of trachea: Used when the mediastinal mass is confirmed as a benign growth originating from the trachea.
C37 - Malignant neoplasm of thymus: This code is for cases where the mediastinal mass is identified as a malignant growth in the thymus.
C34.90 - Malignant neoplasm of unspecified part of unspecified bronchus or lung: This code is used when the mass is a malignant growth, but the specific part of the lung or bronchus is not specified.
D38.1 - Neoplasm of uncertain behavior of trachea, bronchus, and lung: This code applies when the mass's behavior (benign or malignant) is not yet determined.

Which Mediastinal Mass ICD Codes Are Billable?

Here are the mediastinal mass ICD codes and whether they are billable:

R91.8: Yes, billable. It is recognized for reimbursement purposes.
D14.1: Yes, billable. It is valid for insurance claims.
C37: Yes, billable. It serves as a precise diagnosis for billing.
C34.90: Yes, billable. Insurance companies acknowledge it for claims.
D38.1: Yes, billable. It can be used for claims involving undetermined neoplasms.

Clinical Information

Mediastinal masses are abnormal growths in the mediastinum, the space in the chest between the lungs, which houses organs like the heart, trachea, esophagus, and thymus. Here's some comprehensive information:

Mediastinal masses can be benign or malignant, and the exact symptoms often depend on the size and location of the mass.
Common symptoms may include cough, chest pain, shortness of breath, and unexplained weight loss.
Several conditions can cause mediastinal masses, such as lymphoma, thymoma, thyroid disease, or lung cancer.
Diagnosis typically involves imaging tests like X-rays, CT scans, or MRIs. Sometimes, a biopsy may be needed to determine if the mass is benign or malignant.
Treatment varies based on the underlying cause and can range from monitoring to surgery, radiation therapy, or chemotherapy.

Synonyms Include:

Mediastinal Tumor
Chest Mass
Mediastinal Neoplasm
Mediastinal Lesion
Mediastinal Swelling

Commonly asked questions

Depending on its size and location, a mediastinal mass may press on nearby structures, causing complications like difficulty swallowing, superior vena cava syndrome, or pericardial tamponade.

Yes, not all mediastinal masses are cancerous. They can also be benign growths, cysts, or the result of infections or inflammatory conditions.

Diagnosis typically involves a physical examination, patient history, and imaging tests such as X-rays, CT scans, or MRIs. In some cases, a biopsy may be required.

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