ICD-10 Code C82.38 – Follicular lymphoma grade IIIa, lymph nodes of multiple sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.38 – Follicular lymphoma grade IIIa, lymph nodes of multiple sites
What it is
This code identifies follicular lymphoma grade IIIa involving lymph nodes at multiple sites. Use it when the record specifies this exact histologic grade and nodal distribution.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include enlarged lymph nodes, possible fatigue, and other signs of lymphoproliferative disease confirmed by pathology.
When to use this code
Use C82.38 when the provider documents follicular lymphoma grade IIIa and states that multiple lymph node regions are involved. It is appropriate after biopsy or oncology evaluation confirms the diagnosis. If the grade or site is not clearly documented, check documentation before coding.
Do not use for
Do not use this code for other follicular lymphoma grades, unspecified nodal sites, or non-lymph node involvement. If the record does not specify grade IIIa or multiple sites, choose a more accurate code.
Coding tip
Verify both the grade and the anatomic site in the pathology or oncology note before assigning C82.38.