ICD-10 Code C81 – Hodgkin lymphoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81 – Hodgkin lymphoma
What it is
C81 identifies Hodgkin lymphoma, a malignant lymphoma of the lymphatic system. Use it when the record documents Hodgkin lymphoma without a more specific subtype.
Clinical signs
Clinical features vary; refer to documentation. Common findings include enlarged lymph nodes and possible “B symptoms” such as unexplained fever, night sweats, or weight loss.
When to use this code
Use C81 when the clinician diagnoses Hodgkin lymphoma and the chart does not specify a more detailed ICD-10 subtype. It may also fit confirmed cases under evaluation or follow-up when the active diagnosis remains Hodgkin lymphoma. Verify the pathology, oncology note, or discharge summary for the exact wording.
Do not use for
Do not use C81 for non-Hodgkin lymphoma or for lymph node enlargement without a confirmed lymphoma diagnosis. If the record is unclear, check documentation.
Coding tip
Code to the most specific Hodgkin lymphoma subtype only when the documentation clearly names it; otherwise, use C81.