ICD-10 Code C85.83 – Other specified types of non-Hodgkin lymphoma, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C85.83 – Other specified types of non-Hodgkin lymphoma, intra-abdominal lymph nodes
What it is
C85.83 identifies a non-Hodgkin lymphoma involving intra-abdominal lymph nodes when the type is specified but does not fit a more specific category. Use it for documented lymphoma limited to abdominal nodal sites.
Clinical signs
Clinical features vary; refer to documentation. Patients may have enlarged intra-abdominal lymph nodes found on imaging, biopsy, or surgical pathology, with lymphoma confirmed by the treating clinician.
When to use this code
Use this code when the record names an “other specified” non-Hodgkin lymphoma and clearly states intra-abdominal lymph nodes as the site. It is appropriate when the diagnosis is established and the documentation does not support a more specific lymphoma code. Check documentation if the anatomic site or lymphoma type is unclear.
Do not use for
Do not use it for unspecified non-Hodgkin lymphoma, other nodal regions, or extranodal disease. If the chart does not identify the lymphoma subtype or the intra-abdominal nodal location, check documentation.
Coding tip
Code from the pathology or oncology note, and confirm both the lymphoma type and the intra-abdominal lymph node site before assigning C85.83.