ICD-10 Code C83.92 – Non-follicular (diffuse) lymphoma, unspecified, intrathoracic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.92 – Non-follicular (diffuse) lymphoma, unspecified, intrathoracic lymph nodes
What it is
This code identifies a diffuse, non-follicular lymphoma involving intrathoracic lymph nodes, such as mediastinal or hilar nodes. Use it when the record confirms lymphoma in these nodes but does not specify a more exact subtype.
Clinical signs
Clinical features vary; refer to documentation. Commonly, imaging or biopsy shows enlarged intrathoracic lymph nodes, and the pathology report supports non-follicular lymphoma rather than a follicular type.
When to use this code
Use this code when the provider documents non-follicular lymphoma in intrathoracic lymph nodes and no more specific histology or site code is available. It also fits cases where the diagnosis is confirmed by pathology or oncology assessment, but the subtype remains unspecified. Check documentation if the chart names a different nodal region or a more specific lymphoma category.
Do not use for
Do not use this code for follicular lymphoma, other specified lymphoma subtypes, or lymphoma limited to non-intrathoracic nodes. If the record does not clearly identify intrathoracic lymph node involvement, check documentation.
Coding tip
Verify both the lymphoma type and the nodal site before assigning C83.92.