ICD-10 Code C82.25 – Follicular lymphoma grade III, unspecified, lymph nodes of inguinal region and lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.25 – Follicular lymphoma grade III, unspecified, lymph nodes of inguinal region and lower limb
What it is
This code identifies follicular lymphoma grade III involving lymph nodes in the inguinal region or lower limb. It is used when the grade is documented as unspecified within grade III and the anatomic site is specific.
Clinical signs
Patients may present with enlarged, usually painless lymph nodes in the groin or nearby lower-extremity regions. Clinical features vary; refer to documentation for biopsy-confirmed follicular lymphoma and the recorded nodal site.
When to use this code
Use this code when the provider documents follicular lymphoma grade III, unspecified, and names inguinal or lower-limb lymph nodes as the involved site. It fits pathology, oncology, or discharge documentation that clearly supports the diagnosis and location.
Do not infer the grade or site from imaging alone if the record is unclear. If the documentation only says follicular lymphoma without grade or nodal region, check documentation before coding.
Do not use for
Do not use this code for other lymphoma subtypes, non-lymphoma masses, or follicular lymphoma in a different nodal region. Avoid it when the grade is not III or the inguinal/lower-limb site is not documented.
Coding tip
Confirm both the grade and the exact nodal region in the pathology or oncology note before assigning C82.25.