ICD-10 Code C82.12 – Follicular lymphoma grade II, intrathoracic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.12 – Follicular lymphoma grade II, intrathoracic lymph nodes
What it is
This code identifies follicular lymphoma, grade II, involving lymph nodes in the chest. Use it when documentation specifies this lymphoma subtype and the intrathoracic nodal site.
Clinical signs
Clinical features vary; refer to documentation. Common findings in follicular lymphoma include painless lymphadenopathy and evidence of nodal disease on imaging or biopsy.
When to use this code
Use C82.12 when the record clearly states grade II follicular lymphoma in intrathoracic lymph nodes, such as mediastinal or hilar nodes. Code it from confirmed pathology or a clinician’s documented diagnosis. If the site or grade is not specified, check documentation.
Do not use for
Do not use this code for follicular lymphoma at another nodal site or for a different grade. If the diagnosis is only suspected or the location is unclear, check documentation.
Coding tip
Match both the grade and the lymph node site exactly before assigning C82.12.