ICD-10 Code C81.16 – Nodular sclerosis Hodgkin lymphoma, intrapelvic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81.16 – Nodular sclerosis Hodgkin lymphoma, intrapelvic lymph nodes
What it is
This code identifies nodular sclerosis Hodgkin lymphoma involving the intrapelvic lymph nodes. Use it when documentation specifies this Hodgkin lymphoma subtype and pelvic nodal site.
Clinical signs
Findings may include enlarged lymph nodes and other lymphoma-related symptoms, but presentation varies. Confirm the nodular sclerosis subtype and intrapelvic lymph node involvement in the record.
When to use this code
Use this code when the provider documents nodular sclerosis Hodgkin lymphoma with disease in intrapelvic lymph nodes. It also applies when pathology or oncology notes clearly link the subtype to that nodal region. If the site or subtype is unclear, check documentation before coding.
Do not use for
Do not use it for other Hodgkin lymphoma subtypes or for lymphoma in non-pelvic lymph nodes. Do not assign it when the record only says “Hodgkin lymphoma” without the specific subtype and site.
Coding tip
Verify both the histologic subtype and anatomic site; if either is missing, query the provider.