ICD-10 Code C83.08 – Small cell B-cell lymphoma, lymph nodes of multiple sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.08 – Small cell B-cell lymphoma, lymph nodes of multiple sites
What it is
C83.08 identifies small cell B-cell lymphoma involving lymph nodes at multiple sites. Use it for a documented indolent B-cell lymphoma pattern affecting more than one nodal region.
Clinical signs
Findings often include enlarged lymph nodes in more than one area, sometimes with few symptoms. Clinical features vary; refer to documentation and the confirmed pathology or specialist diagnosis.
When to use this code
Assign this code when the provider documents small cell B-cell lymphoma and specifies lymph node involvement at multiple sites. It is appropriate for confirmed nodal disease, whether discovered during workup or follow-up care. If the record does not clearly state the subtype or nodal distribution, check documentation.
Do not use for
Do not use C83.08 for unspecified lymphoma, non-B-cell lymphoma, or disease limited to a single lymph node site. If the chart only says “lymphoma” or the site is unclear, check documentation.
Coding tip
Code only when both the small cell B-cell lymphoma type and multiple lymph node sites are documented.