ICD-10 Code C81.98 – Hodgkin lymphoma, unspecified, lymph nodes of multiple sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81.98 – Hodgkin lymphoma, unspecified, lymph nodes of multiple sites
What it is
C81.98 identifies Hodgkin lymphoma when the type is not further specified and the disease involves lymph nodes at multiple sites. Use it for a documented Hodgkin lymphoma diagnosis affecting more than one nodal region.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include enlarged lymph nodes, often painless, and systemic “B” symptoms such as fever, night sweats, or weight loss.
When to use this code
Use this code when the provider documents Hodgkin lymphoma as unspecified and notes involvement of lymph nodes in multiple sites. It fits cases where the record does not identify a more specific subtype or a single nodal region.
If the pathology or oncology note later specifies a distinct Hodgkin lymphoma type or a different nodal distribution, code to that documented diagnosis instead. Check documentation for laterality, site detail, and histologic subtype.
Do not use for
Do not use it for non-Hodgkin lymphoma, reactive lymphadenopathy, or Hodgkin lymphoma limited to a single nodal site. If the record gives a more specific Hodgkin lymphoma code, use that instead.
Coding tip
Confirm that “multiple sites” is explicitly documented; do not infer it from vague node descriptions.