ICD-10 Code C82.27 – Follicular lymphoma grade III, unspecified, spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.27 – Follicular lymphoma grade III, unspecified, spleen
What it is
This code identifies follicular lymphoma grade III involving the spleen, with the grade III subtype not further specified. Use it when documentation confirms splenic involvement and does not distinguish IIIa from IIIb.
Clinical signs
Clinical features vary; refer to documentation. Common findings in splenic lymphoma include splenomegaly, abdominal fullness, and evidence of lymphoma on pathology or imaging.
When to use this code
Use this code when the record states follicular lymphoma grade III and specifically notes spleen involvement. It is also appropriate when the provider documents the spleen as the involved site but does not specify whether the grade III subtype is IIIa or IIIb. Check documentation if the site or grade is unclear.
Do not use for
Do not use this code if the lymphoma site is not the spleen or if the grade is documented as a different follicular lymphoma category. Do not guess the subtype when the record is incomplete.
Coding tip
Code the exact site and grade from the pathology or oncology note, and query for clarification if the grade III subtype is missing.