ICD-10 Code C82.2 – Follicular lymphoma grade III, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.2 – Follicular lymphoma grade III, unspecified
What it is
C82.2 identifies follicular lymphoma grade III when the record does not specify whether it is IIIa or IIIb. It is a type of non-Hodgkin lymphoma arising from germinal center B cells.
Clinical signs
Clinical features vary; refer to documentation. Common findings include painless lymph node enlargement and other lymphoma-related manifestations, but the grade and subtype must be confirmed in the pathology report.
When to use this code
Use C82.2 when the provider documents follicular lymphoma grade III and does not state a more specific grade subtype. Code it from pathology, oncology, or discharge documentation that clearly identifies the diagnosis. Check documentation if the record only says follicular lymphoma without grade.
Do not use for
Do not use this code for follicular lymphoma grades I, II, or grade IIIa/IIIb when those are separately documented. Do not assign it if the diagnosis is another lymphoma type or if the grade is not confirmed.
Coding tip
Match the code to the exact lymphoma grade in the pathology report and query when the grade is missing or ambiguous.