ICD-10 Code C82.89 – Other types of follicular lymphoma, extranodal and solid organ sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.89 – Other types of follicular lymphoma, extranodal and solid organ sites
What it is
This code identifies follicular lymphoma arising in an extranodal or solid organ site rather than in a lymph node. Use it when the record specifies this lymphoma subtype and location.
Clinical signs
Clinical features vary; refer to documentation. Follicular lymphoma is often described as a slow-growing B-cell lymphoma, and extranodal involvement may be noted on imaging, biopsy, or pathology reports.
When to use this code
Use C82.89 when the provider documents follicular lymphoma involving an extranodal or solid organ site, such as an organ outside the lymphatic system. Code it from pathology, oncology, or discharge documentation that clearly supports the site and histology.
If the record only says follicular lymphoma without site detail, check documentation before assigning this code. You should not infer extranodal involvement from symptoms alone.
Do not use for
Do not use this code for follicular lymphoma limited to lymph nodes or for unspecified lymphoma types. Check documentation if the site is unclear or another lymphoma subtype is documented.
Coding tip
Match both the histology and the anatomic site exactly; if either is missing, query the record before coding.