ICD-10 Code C82.30 – Follicular lymphoma grade IIIa, unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.30 – Follicular lymphoma grade IIIa, unspecified site
What it is
C82.30 identifies follicular lymphoma grade IIIa when the site is not specified. Use it for a documented diagnosis of this higher-grade follicular lymphoma subtype, not for other lymphoma types.
Clinical signs
Clinical features vary; refer to documentation. Follicular lymphoma may present with painless lymphadenopathy, fatigue, or other nonspecific lymphoma findings, and grade IIIa should be explicitly stated by the provider.
When to use this code
Use this code when the record clearly documents follicular lymphoma grade IIIa and no anatomic site is identified. It also fits cases where the diagnosis is confirmed but the primary site is not available in the note or report.
If the provider specifies a nodal or extranodal site, code to the more specific site-based option instead. Check documentation when the grade or site is unclear.
Do not use for
Do not use for follicular lymphoma grades other than IIIa, or for unspecified lymphoma without a documented follicular subtype. Do not assign it when a specific site is documented and another code is more precise.
Coding tip
Verify both the histologic grade and the absence of a site statement before selecting C82.30.