ICD-10 Code C82.55 – Diffuse follicle center lymphoma, lymph nodes of inguinal region and lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.55 – Diffuse follicle center lymphoma, lymph nodes of inguinal region and lower limb
What it is
C82.55 identifies diffuse follicle center lymphoma involving lymph nodes in the inguinal region and lower limb. Use it when the documented lymphoma site is limited to those nodes and the diagnosis is follicle center lymphoma.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with enlarged inguinal or lower-limb lymph nodes, and diagnosis is typically confirmed by pathology or other specialist evaluation.
When to use this code
Use this code when the provider documents diffuse follicle center lymphoma and clearly states the affected lymph nodes are in the inguinal region or lower limb. It is appropriate for initial diagnosis, follow-up, or ongoing care when the same site remains documented. Check documentation if the site is broader or unspecified.
Do not use for
Do not use this code for follicular lymphoma at another nodal site or when the record only says lymphoma without the diffuse follicle center subtype. Do not guess the site if it is not documented.
Coding tip
Verify both the lymphoma subtype and the exact nodal location before assigning C82.55.