ICD-10 Code C83.06 – Small cell B-cell lymphoma, intrapelvic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.06 – Small cell B-cell lymphoma, intrapelvic lymph nodes
What it is
C83.06 identifies small cell B-cell lymphoma involving intrapelvic lymph nodes. Use it when the record specifies this lymphoma subtype and the pelvic nodal location.
Clinical signs
Clinical features vary; refer to documentation. Findings may include enlarged pelvic lymph nodes on imaging or biopsy-confirmed small cell B-cell lymphoma.
When to use this code
Use this code when the provider documents small cell B-cell lymphoma in intrapelvic lymph nodes, such as a confirmed pelvic nodal lymphoma diagnosis. It is appropriate for pathology, oncology, or discharge documentation that names this exact site and histology. Check documentation if the site is broader or unspecified.
Do not use for
Do not use it for lymphoma in other nodal regions, unspecified B-cell lymphoma, or a suspected mass without confirmation. If the record does not clearly identify intrapelvic lymph node involvement, check documentation.
Coding tip
Code the documented anatomic site exactly; pelvic nodes are not interchangeable with other lymph node groups.