ICD-10 Code C81.13 – Nodular sclerosis Hodgkin lymphoma, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81.13 – Nodular sclerosis Hodgkin lymphoma, intra-abdominal lymph nodes
What it is
This code identifies nodular sclerosis Hodgkin lymphoma involving intra-abdominal lymph nodes. Use it when the diagnosis specifies this Hodgkin lymphoma subtype and the abdominal nodal site.
Clinical signs
Clinical features vary; refer to documentation. Typical Hodgkin lymphoma findings may include enlarged lymph nodes and systemic “B” symptoms, but the subtype and intra-abdominal location must be documented.
When to use this code
Use C81.13 when the provider documents nodular sclerosis Hodgkin lymphoma affecting intra-abdominal lymph nodes. It is appropriate for confirmed diagnoses, pathology reports, or oncology notes that name both the subtype and site. If the record only says Hodgkin lymphoma without subtype or location, check documentation.
Do not use for
Do not use this code for Hodgkin lymphoma at a different nodal site or for unspecified Hodgkin lymphoma. Also avoid it when the record describes a non-Hodgkin lymphoma or when the subtype is not confirmed.
Coding tip
Verify both the nodular sclerosis subtype and the intra-abdominal nodal site before assigning C81.13.