ICD-10 Code C82.36 – Follicular lymphoma grade IIIa, intrapelvic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.36 – Follicular lymphoma grade IIIa, intrapelvic lymph nodes
What it is
C82.36 identifies follicular lymphoma grade IIIa involving intrapelvic lymph nodes. Use it when documentation specifies this lymphoma subtype and pelvic nodal location.
Clinical signs
Clinical features vary; refer to documentation. Follicular lymphoma is often described as a slow-growing nodal lymphoma with enlarged lymph nodes, sometimes found incidentally or with systemic lymphoma findings.
When to use this code
Use this code when the provider documents follicular lymphoma grade IIIa and clearly states the disease is in intrapelvic lymph nodes. It may appear in pathology, oncology, or discharge documentation. If the grade or nodal site is not specified, check documentation before assigning C82.36.
Do not use for
Do not use this code for other follicular lymphoma grades, unspecified follicular lymphoma, or lymphoma in non-pelvic nodes. If the record does not confirm grade IIIa and intrapelvic involvement, check documentation.
Coding tip
Confirm both the histologic grade and the exact lymph node location before coding C82.36.