ICD-10 Code C83.1 – Mantle Cell Lymphoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.1 – Mantle cell lymphoma
What it is
C83.1 identifies mantle cell lymphoma, a type of non-Hodgkin lymphoma arising from B lymphocytes. Use it when the record specifically documents mantle cell lymphoma.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include enlarged lymph nodes, splenomegaly, or involvement of blood, bone marrow, or gastrointestinal tract.
When to use this code
Use C83.1 when the provider diagnoses mantle cell lymphoma and the record supports that specific subtype. It applies whether the disease is newly diagnosed, recurrent, or being followed, if the documentation still identifies mantle cell lymphoma.
If the chart only says non-Hodgkin lymphoma or another B-cell lymphoma subtype, do not default to this code. Check documentation for the exact histology and site details.
Do not use for
Do not use C83.1 for Hodgkin lymphoma, unspecified non-Hodgkin lymphoma, or other clearly named lymphoma subtypes. Check documentation when the pathology report is unclear.
Coding tip
Code the most specific lymphoma diagnosis documented; if mantle cell lymphoma is not explicitly stated, verify the pathology or provider assessment before assigning C83.1.