ICD-10 Code C83.13 – Mantle cell lymphoma, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.13 – Mantle cell lymphoma, intra-abdominal lymph nodes
What it is
C83.13 identifies mantle cell lymphoma involving intra-abdominal lymph nodes. Use it when the diagnosis specifically localizes this lymphoma to abdominal nodal disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include enlarged abdominal lymph nodes on imaging or biopsy-confirmed mantle cell lymphoma in intra-abdominal nodal tissue.
When to use this code
Use this code when the provider documents mantle cell lymphoma with primary or current involvement of intra-abdominal lymph nodes. It is appropriate for confirmed nodal disease in the abdomen, including pathology or imaging-supported staging notes. If the record only says mantle cell lymphoma without site, check documentation.
Do not use for
Do not use this code for unspecified mantle cell lymphoma or for disease limited to other lymph node regions. Check documentation if the record describes extranodal or disseminated involvement instead.
Coding tip
Code the documented anatomic site exactly; if the lymphoma site is unclear, query the provider before assigning C83.13.