ICD-10 Code C82.37 – Follicular lymphoma grade IIIa, spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.37 – Follicular lymphoma grade IIIa, spleen
What it is
C82.37 identifies follicular lymphoma grade IIIa involving the spleen. Use it when documentation specifies this lymphoma subtype and the spleen is the named site.
Clinical signs
Clinical features vary; refer to documentation. Follicular lymphoma may present with lymph node enlargement, splenic involvement, or incidental imaging findings, but the site and grade must be confirmed.
When to use this code
Use this code when the provider documents follicular lymphoma grade IIIa of the spleen, including pathology or oncology notes that clearly name both the grade and the splenic site. It is appropriate for confirmed diagnoses, not for suspected lymphoma or unspecified follicular lymphoma.
Do not use for
Do not use this code for other follicular lymphoma grades, other lymphoma types, or cases where the spleen is not documented as involved. Check documentation if the grade or site is unclear.
Coding tip
Verify both the histologic grade and the anatomic site before assigning C82.37.