ICD-10 Code C83.97 – Non-follicular (diffuse) lymphoma, unspecified, spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.97 – Non-follicular (diffuse) lymphoma, unspecified, spleen
What it is
C83.97 identifies a non-follicular, diffuse lymphoma involving the spleen when the exact subtype is not specified. Use it when the record documents splenic lymphoma but does not name a more precise histology.
Clinical signs
Clinical features vary; refer to documentation. Splenic involvement may be described with splenomegaly, abdominal fullness, or imaging findings consistent with lymphoma, but the diagnosis should be supported by pathology or specialist assessment.
When to use this code
Use this code when the provider documents diffuse or non-follicular lymphoma of the spleen and no more specific lymphoma type is available. It also fits cases where the spleen is the documented site and the subtype remains unspecified after workup.
If the chart names a defined lymphoma subtype, code the more specific diagnosis instead. Check whether the record indicates primary splenic involvement, secondary spread, or another lymphoma category before assigning C83.97.
Do not use for
Do not use this code for follicular lymphoma, Hodgkin lymphoma, or lymphoma in another organ without splenic involvement. Check documentation if the site or histology is unclear.
Coding tip
Confirm both the lymphoma type and the spleen as the documented site before coding, and query for specificity when the pathology report is incomplete.