ICD-10 Code C83.83 – Other non-follicular lymphoma, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.83 – Other non-follicular lymphoma, intra-abdominal lymph nodes
What it is
This code identifies a non-follicular lymphoma involving lymph nodes within the abdomen. Use it when the record specifies intra-abdominal nodal disease and does not name a more specific lymphoma type.
Clinical signs
Clinical features vary; refer to documentation. Patients may have abdominal lymphadenopathy confirmed by imaging, biopsy, or pathology, with lymphoma described as non-follicular and centered in intra-abdominal nodes.
When to use this code
Use C83.83 when the provider documents other non-follicular lymphoma affecting intra-abdominal lymph nodes and no more specific code is supported. It is appropriate for confirmed nodal involvement in the abdominal cavity. Check documentation if the site is described only as abdominal or retroperitoneal.
Do not use for
Do not use this code for follicular lymphoma, extranodal lymphoma, or lymphoma limited to non-abdominal nodes. If the pathology or note names a different lymphoma subtype, code that diagnosis instead.
Coding tip
Verify both the lymphoma type and the nodal site; the code depends on documentation of intra-abdominal lymph node involvement.