ICD-10 Code C83.19 – Mantle Cell Lymphoma, Extranodal and Solid Organ Sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.19 – Mantle cell lymphoma, extranodal and solid organ sites
What it is
This code identifies mantle cell lymphoma involving extranodal tissue or a solid organ rather than only lymph nodes. Use it when documentation specifies mantle cell lymphoma at sites such as the gastrointestinal tract, spleen, or other solid organs.
Clinical signs
Clinical features vary; refer to documentation. Mantle cell lymphoma may present with lymphadenopathy, splenomegaly, or extranodal masses, and diagnosis is usually confirmed by pathology and immunophenotyping.
When to use this code
Use C83.19 when the record clearly states mantle cell lymphoma with extranodal or solid organ involvement. Choose this code when the site is documented as outside lymph nodes and the diagnosis is not limited to nodal disease. If the site is unclear, check documentation.
Do not use for
Do not use this code for mantle cell lymphoma limited to lymph nodes or for unspecified lymphoma. If the chart does not identify extranodal or solid organ involvement, select the more accurate documented code.
Coding tip
Confirm the anatomic site in the pathology, oncology, or discharge note before assigning C83.19.