ICD-10 Code C83.36 – Diffuse large B-cell lymphoma, intrapelvic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.36 – Diffuse large B-cell lymphoma, intrapelvic lymph nodes
What it is
C83.36 identifies diffuse large B-cell lymphoma involving intrapelvic lymph nodes. Use it when documentation specifies this lymphoma subtype and pelvic nodal site.
Clinical signs
Clinical features vary; refer to documentation. You may see enlarged pelvic lymph nodes on imaging, biopsy-confirmed large B-cell lymphoma, or symptoms from nodal mass effect.
When to use this code
Use this code when the provider documents diffuse large B-cell lymphoma in intrapelvic lymph nodes, such as pelvic nodal disease confirmed by pathology or imaging with clear site specification. Code it only when the anatomic location and lymphoma type are both stated.
Do not use for
Do not use it for unspecified lymphoma, other B-cell lymphoma subtypes, or disease limited to non-pelvic nodes. Check documentation if the record does not clearly identify intrapelvic lymph node involvement.
Coding tip
Verify both the histology and the pelvic nodal site before assigning C83.36.