ICD-10 Code C83.93 – Non-follicular (diffuse) lymphoma, unspecified, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.93 – Non-follicular (diffuse) lymphoma, unspecified, intra-abdominal lymph nodes
What it is
This code identifies a diffuse, non-follicular lymphoma documented in the intra-abdominal lymph nodes, without a more specific subtype. Use it when the record confirms the lymphoma site but does not name a precise histology.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records may note abdominal lymph node enlargement, abdominal pain, or imaging findings suggesting lymphomatous involvement.
When to use this code
Use this code when the provider documents non-follicular or diffuse lymphoma affecting intra-abdominal lymph nodes and does not specify a more exact type. It is also appropriate when pathology or imaging supports the diagnosis, but the subtype remains unspecified. Check documentation for the exact nodal site and lymphoma wording.
Do not use for
Do not use this code for follicular lymphoma, extranodal disease, or lymphoma limited to a different lymph node region. If the record specifies a more precise histology or site, code that instead.
Coding tip
Verify both the lymphoma type and the anatomic site before assigning C83.93.