ICD-10 Code C82.15 – Follicular lymphoma grade II, lymph nodes of inguinal region and lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.15 – Follicular lymphoma grade II, lymph nodes of inguinal region and lower limb
What it is
C82.15 identifies grade II follicular lymphoma involving lymph nodes in the inguinal region and lower limb. Use it when the documentation specifies this lymphoma grade and the nodal site.
Clinical signs
Clinical features vary; refer to documentation. Follicular lymphoma is commonly described as an indolent nodal lymphoma, often presenting with painless lymph node enlargement and confirmed by pathology.
When to use this code
Use C82.15 when the provider documents follicular lymphoma grade II and clearly states involvement of inguinal or lower-limb lymph nodes. It also fits when pathology or oncology notes identify that exact nodal location. If the site is unspecified, check documentation before coding.
Do not use for
Do not use this code for other follicular lymphoma grades or for lymphomas in different nodal regions. Do not assign it when the record does not confirm inguinal or lower-limb lymph node involvement.
Coding tip
Match both the lymphoma grade and the nodal site exactly; if either element is missing, verify the chart before selecting C82.15.